reducing the amount of code in ram to free up space

Heres the full code. It was too long thats why I only posted the code that I needed help on.

  /*
Arduino Uno
  */
  #include <LcdBarGraph.h>  //include bar graph library
  #include <EEPROM.h>         // Add in the EEPROM library
  #include <MenuBackend.h>    //MenuBackend library - copyright by Alexander Brevig
  #include <LiquidCrystal.h>  //this library is included in the Arduino IDE
  #include <MemoryFree.h> // used to determin  how much ram is used. 
  #include <avr/pgmspace.h> //used to decrese ram usage == free up ram==
   // LiquidCrystal display with:
  // rs on pin 7
  // rw on ground
  // enable on pin 6
  // d4, d5, d6, d7 on pins 5, 4, 3, 2
  LiquidCrystal lcd(2, 12, 4, 13, 6, 7);
   
   //Setup for screen backlight
  const byte backLED = 3;   //  Use PWM pin 3 for the backlight
  byte lightadj = EEPROM.read(2);
  
  //Setup for contrast setting
  const byte contrastlight = 5;  // use PWM pin 5 for the contrast control
  byte contrastadj = EEPROM.read(3);

  
  // setup for bar graph and other inputs/outputs
  byte lcdNumCols = 11; // -- number of columns in the LCD used for the bar graph
  byte sensorbar = A0; // sensor input set to byte
  byte afrbar = A1; // afr input set to byte
  LcdBarGraph lbg(&lcd, lcdNumCols);  // -- creating line bar graph
  float peaksensor = 0;  //set peak sensor to a low value so it'll work properly
  float aaa = 10;  // 
 
  const byte clearPB = 8;  // set button two on pin 8  to clear Peak sensor HOld value to zero

  byte sstwarn = EEPROM.read(1);  // sensor warning

  
  //  Menu Pin Inputs
  const byte buttonPinLeft = 8;      // pin for the Up button
  const byte buttonPinRight = 9;    // pin for the Down button
  const byte buttonPinEsc = 10;     // pin for the Esc button
  const byte buttonPinEnter = 11;   // pin for the Enter button
  
  // Pins combination used to enable menu
  const byte buttonPressed = 11;     // use to enable the alreadyPressed state to enable menu
  const byte cancelButtonPressed = 10;   // used to enable the alreadyPressed state to enable menu
  
  int alreadyPressed;              // trigger the menu to turn on if its on
  
  //  Use for MENU
  int lastButtonPushed = 0;       
  
  int lastButtonEnterState = LOW;   // the previous reading from the Enter input pin
  int lastButtonEscState = LOW;   // the previous reading from the Esc input pin
  int lastButtonLeftState = LOW;   // the previous reading from the Left input pin
  int lastButtonRightState = LOW;   // the previous reading from the Right input pin

  
  long lastEnterDebounceTime = 0;  // the last time the output pin was toggled
  long lastEscDebounceTime = 0;  // the last time the output pin was toggled
  long lastLeftDebounceTime = 0;  // the last time the output pin was toggled
  long lastRightDebounceTime = 0;  // the last time the output pin was toggled
  long debounceDelay = 500;    // the debounce time
  


  //Menu variables
  MenuBackend menu  = MenuBackend(menuUsed,menuChanged);
  //initialize menuitems
      MenuItem BackLight = MenuItem("Backlight");
        MenuItem BackLight10 = MenuItem("10%");
        MenuItem BackLight20 = MenuItem("20%");
        MenuItem BackLight30 = MenuItem("30%");
        MenuItem BackLight40 = MenuItem("40%");
        MenuItem BackLight50 = MenuItem("50%");
        MenuItem BackLight60 = MenuItem("60%");
        MenuItem BackLight70 = MenuItem("70%");
        MenuItem BackLight80 = MenuItem("80%");
        MenuItem BackLight90 = MenuItem("90%");
        MenuItem BackLight100 = MenuItem("100%");
       /* MenuItem Contrast = MenuItem("Contrast");
        MenuItem Contrast10 = MenuItem("10%");
        MenuItem Contrast20 = MenuItem("20%");
        MenuItem Contrast30 = MenuItem("30%");
        MenuItem Contrast40 = MenuItem("40%");
        MenuItem Contrast50 = MenuItem("50%");
        MenuItem Contrast60 = MenuItem("60%");
        MenuItem Contrast70 = MenuItem("70%");
        MenuItem Contrast80 = MenuItem("80%");
        MenuItem Contrast90 = MenuItem("90%");
        MenuItem Contrast100 = MenuItem("100%");*/
        
      MenuItem sensorWarning = MenuItem("Set sensor Warning"); 
        MenuItem sensor1 = MenuItem("1");
        MenuItem sensor2 = MenuItem("2");
        MenuItem sensor3 = MenuItem("3");
        MenuItem sensor4 = MenuItem("4");
        MenuItem sensor5 = MenuItem("5");
        MenuItem sensor6 = MenuItem("6");
        MenuItem sensor7 = MenuItem("7");
        MenuItem sensor8 = MenuItem("8");
        MenuItem sensor9 = MenuItem("9");
        MenuItem sensor10 = MenuItem("10");
        MenuItem sensor11 = MenuItem("11");
        MenuItem sensor12 = MenuItem("12");
        MenuItem sensor13 = MenuItem("13");
        MenuItem sensor14 = MenuItem("14");
        MenuItem sensor15 = MenuItem("15");
        MenuItem sensor16 = MenuItem("16");
        MenuItem sensor17 = MenuItem("17");
        MenuItem sensor18 = MenuItem("18");
        MenuItem sensor19 = MenuItem("19");
        MenuItem sensor20 = MenuItem("20");
        MenuItem sensor21 = MenuItem("21");
        MenuItem sensor22 = MenuItem("22");
        MenuItem sensor23 = MenuItem("23");
        MenuItem sensor24 = MenuItem("24");
        MenuItem sensor25 = MenuItem("25");
        MenuItem sensor26 = MenuItem("26");
        MenuItem sensor27 = MenuItem("27");
        MenuItem sensor28 = MenuItem("28");
        MenuItem sensor29 = MenuItem("29");
        MenuItem sensor30 = MenuItem("30");
        MenuItem sensor31 = MenuItem("31");
        MenuItem sensor32 = MenuItem("32");
        MenuItem sensor33 = MenuItem("33");
        MenuItem sensor34 = MenuItem("34");
        MenuItem sensor35 = MenuItem("35");
        MenuItem sensor36 = MenuItem("36");
        MenuItem sensor37 = MenuItem("37");
        MenuItem sensor38 = MenuItem("38");
        MenuItem sensor39 = MenuItem("39");
        MenuItem sensor40 = MenuItem("40");
        MenuItem sensor41 = MenuItem("41");
        MenuItem sensor42 = MenuItem("42");
        MenuItem sensor43 = MenuItem("43");
        MenuItem sensor44 = MenuItem("44");
        MenuItem sensor45 = MenuItem("45");   
      MenuItem Calibration = MenuItem("Calibration");
  
  
  void setup()
  {    
    
    Serial.begin(9600);  // setup up serial connection for testing
    analogWrite(backLED, lightadj);  //turn on backlight
    analogWrite(contrastlight, contrastadj); // turn on the contrast 
    // Analog Input setup
    pinMode(A0, INPUT);  // Set pin A0 as input
    pinMode(A1, INPUT); // Set pin A1 as input
    
    // Digital Input Setup  
    pinMode(buttonPinLeft, INPUT);
    pinMode(buttonPinRight, INPUT);
    pinMode(buttonPinEnter, INPUT);
    pinMode(buttonPinEsc, INPUT);
    pinMode(buttonPressed, INPUT);
    pinMode(cancelButtonPressed, INPUT);
    //pinMode(13, OUTPUT); // onbaord LED as indicator only  
    //pinMode(contrastlight, OUTPUT);
    
    
    lcd.begin(20, 2);// LCD Setup
  
    //configure menu order
    menu.getRoot().add(BackLight);
    BackLight.addRight(sensorWarning).addRight(Calibration);
    BackLight.add(BackLight10).addRight(BackLight20).addRight(BackLight30).addRight(BackLight40).addRight(BackLight50).addRight(BackLight60)
    .addRight(BackLight70).addRight(BackLight80).addRight(BackLight90).addRight(BackLight100);
    sensorWarning.add(sensor1).addRight(sensor2).addRight(sensor3).addRight(sensor4).addRight(sensor5).addRight(sensor6).addRight(sensor7)
    .addRight(sensor8).addRight(sensor9).addRight(sensor10).addRight(sensor11).addRight(sensor12).addRight(sensor13).addRight(sensor14)
    .addRight(sensor15).addRight(sensor16).addRight(sensor17).addRight(sensor18).addRight(sensor19).addRight(sensor20).addRight(sensor21)
    .addRight(sensor22).addRight(sensor23).addRight(sensor24).addRight(sensor25).addRight(sensor26).addRight(sensor27).addRight(sensor28)
    .addRight(sensor29).addRight(sensor30).addRight(sensor31).addRight(sensor32).addRight(sensor33).addRight(sensor34).addRight(sensor35).addRight(sensor36)
    .addRight(sensor37).addRight(sensor38).addRight(sensor39).addRight(sensor40).addRight(sensor41).addRight(sensor42).addRight(sensor43).addRight(sensor44)
    .addRight(sensor45);
    //Contrast.add(Contrast10).addRight(Contrast20).addRight(Contrast30).addRight(Contrast40).addRight(Contrast50).addRight(Contrast60)
    //.addRight(Contrast70).addRight(Contrast80).addRight(Contrast90).addRight(Contrast100);
   
    
    //menu.toRoot();
    lcd.setCursor(0,0);  
    lcd.print("   test");
    lcd.setCursor(0,1);
    lcd.print("     test");
    delay(3000);        // Delay set to show the into for 2.3 seconds
    lcd.clear();      // clear the screen
    delay(500);      // delay for 1 sec before going to the loop
  
  }  // setup()...