I need assistance with this to add it in my notes

QUESTION 3 Your monthly profit (in dollars) from selling magazines is given by = 9x + 6x + 10 where x is the number of magazines you sell in a month. If you are currently selling 50 magazines per month, find your profit and your marginal profit, in dollars. (Round your answers to the nearest cent.) (a) The total profit is $ (b) The marginal profit is $ so the profit would (increase/decreaseot change) per each additional magazine in sales