Hello, could someone check the answer for me I think i got it figured out!!

Kevin takes classes at both Westside Community College and Pinewood Community College. At Westside, class fees are $98 per credit hour, and at Pinewood, class fees are $115 per credit hour. Kevin is taking a combined total of 15 credit hours at the two schools. Suppose that he is taking w credit hours at Westside. Write an expression for the combined total dollar amount he paid for his class fees.

Here is a solution started!! is this right?
98w+115(15-w)
98w+1725 -115w
1725 - 17w

Question

Hello, could someone check the answer for me I think i got it figured out!!

Kevin takes classes at both Westside Community College and Pinewood Community College. At Westside, class fees are $98 per credit hour, and at Pinewood, class fees are $115 per credit hour. Kevin is taking a combined total of 15 credit hours at the two schools. Suppose that he is taking w credit hours at Westside. Write an expression for the combined total dollar amount he paid for his class fees.

Here is a solution started!! is this right? 
98w+115(15-w)
98w+1725 -115w
          1725 - 17w