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

### Instruction:
Mary and Rose went shopping to buy presents. They spent the same amount. Mary bought two pairs of sunglasses for $50 each and a pair of jeans for $100.  Rose bought a pair of shoes at $150 and two decks of basketball cards. How much did one deck of basketball cards cost?

### Response:
 Jozi mbili za miwani ya jua zinagharimu 2 x $50 = $<<2*50=100>>100.
Hivyo, Mary alitumia $100 + $100 = $<<100+100=200>>200.
Hivyo, mabara mbili ya kadi za mpira wa kikapu yanagharimu $200 - $150 = $<<200-150=50>>50.
Hivyo, mabara moja ya kadi za mpira wa kikapu yanagharimu $50/2 = $<<50/2=25>>25.