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

### Instruction:
Donny saves $15 on Monday, $28 on Tuesday and $13 on Wednesday. On Thursday he spends half of his total savings so far. How much did he spend?

### Response:
Total saved=15+28+13=<<15+28+13=56>>56
Spending=56/2=$<<56/2=28>>28
#### 28