To find out how much money Reem has after paying her friend back, we can follow these steps:
- Start with the amount Reem earns: $43.78
- Subtract the amount she owes her friend: $15.25
So, the calculation is:
\[ 43.78 - 15.25 = 28.53 \]
After paying her friend back, Reem has $28.53.
The correct response is B. $28.53.