Strain guage

Hello everyone!
I want to build a project based on Arduino.
Basically i want to get 2 different weight bags readings from strain gauge full bridge using hx711. ( one weight bag reading should be inbetween 19-25kg while other should be between 38-45kg).

When we remove the weight bag from the strain gauge Arduino should make a ledger in sd card and enter the entry according to the weight of the bag.

In ledger we can later see how many bags were of 20kg and how many of them were 40 kg!

Need help in programming!!!

What's your background?