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

### Instruction:
Daphney buys 5 kg of potatoes at the supermarket. If 2 kg of potatoes costs $6, how much will she pay?

### Response:
First find the price per kilogram of potatoes: $6 / 2 = $<<6/2=3>>3/kg
Then multiply that price by the number of kilograms she buys to find the total price: $3/kg * 5 kg = $<<3*5=15>>15
#### 15