If then statement needed

Tough day at the office everyone. I have 6 different tabs with store numbers in column A, item numbers in column B, and random numbers in column c. I need to vlookup each tabs information to a master sheet, but cant considering I need the vlookup to find store first then item number to ensure it retrieves the proper random number from column c. if someone could explain how to do one of the tabs I can figure out all of the tabs after. Sheet information is what I was given and sheet labeled final sheet is what I need to vlookup the information to. Any suggestions? am I making sense?