A florist currently sells 42000 bouquets per year at a cost of 13 dollars each. In the previous year when they raised the price to 20 dollars, they...

A florist currently sells 42000 bouquets per year at a cost of 13 dollars each. In the previous year when they raised the price to 20 dollars, they only sold 28000 bouquets that year. Assuming the amount of bouquets sold is in a linear relationship with the cost, what price should the florist charge per bouquet to maximize their revenue?