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

### Instruction:
In a grocery store, Julia bought 2 pieces of Snickers and 3 packs of M&M's. If each piece of Snickers costs $1.5 and a pack of M&M's has the same cost as 2 Snickers, how much is Julia's change if she gave the cashier 2 $10 bills?

### Response:
 Vipande viwili vya Snickers vina gharama ya $1.5 x 2 = $<<1.5*2=3>>3.
Pakiti moja ya M&M's ina gharama ya $3, hivyo pakiti 3 ina gharama ya $3 x 3 = $<<3*3=9>>9.
Jumla ya kiasi ambacho Julia anapaswa kulipa ni $3 + $9 = $<<3+9=12>>12.
Hivyo, pesa yake ya kubadilisha ni $10 x 2 - $12 = $20 - $12 = $<<10*2-12=8>>8.