The 3 cans of peas cost 39 = $27
The 5 bags of flour cost 515 = $75
The 7 packs of milk cost 7*12.50 = $87.50
The total cost of all the items is 27+75+87.50 = $189.50
To calculate the change she received, you subtract the total cost from the amount she had:
change = 200 - 189.50 = $10.50
So Alicia received $10.50 change.