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

### Instruction:
Maddie wants to see how much her mom spends on coffee each week. She makes herself 2 cups of coffee per day. Each cup has 1.5 ounces of coffee beans. A bag of coffee costs $8 and contains 10.5 ounces of beans. She uses 1/2 a gallon of milk per week. A gallon of milk costs $4. She doesn't add any sugar to the coffee. How much does she spend on her coffee per week?

### Response:
 Yeye hutumia unga wa kahawa wa 3 kwa siku kwa sababu 2 x 1.5 = <<2*1.5=3>>3
Yeye hutumia unga wa kahawa wa 21 kwa wiki kwa sababu 7 x 3 = <<7*3=21>>21
Yeye hununua mifuko 2 ya unga wa kahawa kwa wiki kwa sababu 21 / 10.5 = <<21/10.5=2>>2
Yeye hutumia $16 kwa unga wa kahawa kwa wiki kwa sababu 2 x 8 = <<16=16>>16
Yeye hutumia $2 kwa maziwa kwa wiki kwa sababu 4 x (1/2) = <<4*(1/2)=2>>2
Yeye hutumia $18 kwa kahawa yake kwa wiki kwa sababu 16 + 2 = <<16+2=18>>18