6. A-One bakery in Brampton sells 350 fruit cakes slices each month for $3.25 each. They are looking for help to come up with a strategy to increase revenue. A student from our school who works their part time conducts a survey. The results of the survey indicate that sales of the fruit cake slices would increase by 80 per month for each $0.10 decrease in price. c. Determine the marginal revenue from the sales of 200 slices of fruit cake.