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

### Instruction:
Marlene wants to buy half a dozen of shirts to avail of the sale. The regular price of a shirt is $50 and is now on sale at a 20% discount. How much will Marlene pay for the shirts?

### Response:
 Marlene anataka kununua 12/2 = <<12/2=6>>6 mashati.
Bei ya punguzo ya shati ni $50 x 20/100 = $10.
Hivyo, shati litagharimu $50 - $10 = $<<50-10=40>>40 kila moja.
Hivyo, Marlene atalipa $40 x 6 = $<<40*6=240>>240 kwa mashati hayo.