Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Kwenye duka la keki, kipande kimoja cha keki ya safu moja ni $4 na kipande cha keki ya safu mbili ni $7. Dusty ananunua vipande 7 vya keki ya safu moja na vipande 5 vya keki ya safu mbili. Ikiwa analipa na noti ya $100, atapata kiasi gani cha pesa taslimu?


### Response:
 Vipande vya keki ya safu moja vina gharama ya $4 x 7 = $<<4*7=28>>28.
Vipande vya keki ya safu mbili vina gharama ya $7 x 5 = $35.
Jumla ya vipande vyote vya keki inagharimu $28 + $35 = $<<28+35=63>>63.
Atapokea mabadiliko ya $100 - $63 = $37.