Calculus 2 Master needed, evaluate the indefinite integral of: So far I had applied the integration by parts and got: do we do integration by parts again? also, do we simplify the x at my current stage? steps shown would be appreciated

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books