amount of apples bought =$ 2.6
amount of peaches bought =$ 1.475
amount given by you to cashier= $ 20
amount received by me= amount given by you to cashier - [amount of apples bought +amount of peaches bought]
= 20 - [1.475 + 2.6]
= 20 - [ 4.075]
= $15.925
so, change received by me = $15.925