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

### Instruction:
Billy's mom sends him to get ketchup. She gives him $10 and tells him to get the best deal on ketchup that he can and to spend all $10 on ketchup. He finds a bottle with 10 oz that cost $1 each. He finds a bottle that costs $2 that contains 16 ounces. He finds a bottle with 25 ounces that costs $2.5. He finds a $5 bottle that contains 50 ounces. Finally, he finds a $10 bottle with 200 ounces. How many bottles of ketchup does he buy?

### Response:
 Chupa ya unga wa 10 oz inagharimu $0.1 kwa oz kwa sababu 1 / 10 = <<1/10=.1>>0.1
Chupa ya unga wa 16 oz inagharimu $0.125 kwa oz kwa sababu 2 / 16 = <<2/16=.125>>0.125
Chupa ya unga wa 25 oz inagharimu $0.125 kwa oz kwa sababu 2.5 / 20 = <<2.5/20=.125>>0.125
Chupa ya unga wa 50 oz inagharimu $0.1 kwa oz kwa sababu 5 / 50 = <<5/50=.1>>0.1
Chupa ya unga wa 200 oz inagharimu $0.05 kwa oz kwa sababu 10 / 200 = <<10/200=.05>>0.05
Chupa ya unga wa 200 oz ni rahisi zaidi kwa kila oz kwa sababu 0.05 < 0.08 < 0.1 < 0.125
Ananunua chupa 1 ya kitunguu saumu kwa sababu 10 / 10 = <<10/10=1>>1