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

### Instruction:
Margo donated $4300 to Jayden's fundraising campaign. If Julie donated $4700 to Jayden's campaign, What's half the difference in the amount they contributed?

### Response:
If Julie donated $4700 to Jayden's campaign, and Margo donated $4300, the difference in their contribution is $4700-$4300=$400
Half the difference in the amount they contributed is ($400/2)=$<<400/2=200>>200
#### 200