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

### Instruction:
Bob started out the week with $80. On Monday alone, he spent half the money. On Tuesday, he spent one-fifth of the amount left from Monday. On Wednesday, he spent 3/8ths of the amount left from Tuesday. How much does he have left now?

### Response:
 Jumatatu, alitumia nusu ya $80 hivyo akabakiwa na $80-(1/2)*$80 = $<<80-(1/2)*80=40>>40
Jumanne, alitumia 1/5 ya $40 hivyo akabakiwa na $40-(1/5)*40 = $<<40-(1/5)*40=32>>32
Jumatano, alitumia 3/8 ya $32 hivyo akabakiwa na $32-(3/8)*$32 = $20