Rolf's Golf store sells golf balls for $30 per dozen. The store's overhead expenses are 26% of cost and the owners require a profit of 19% of cost.

a. How much does Rolf's Golf store buy the golf balls for? $ per dozen Round to the nearest cent

b. What is the price needed to cover all the costs and expenses? $ Round to the nearest cent

c. What is the highest rate of markdown at which the store will still break even? % Round to two decimal places

d. What markdown rate would price the golf balls at cost? % Round to two decimal places