ECM-1240 erergy meter read Binary bytes

Hi, masters. Help me please :cry: , i have an ecm-1240 device it sends 64 bytes all of them per second.

One value is represented by two bytes like volts where Byte 4 = MSB and Byte 5 = LSB. Other value

like Power is represented by 5 bytes where Byte 6 = LSB and Byte 10= MSB.

How can i extract this values to decimal?