Rolf's Golf store sells golf balls for $$27$ per dozen. The store's overhead expenses are

$27\%$ of cost and the owners require a profit of $20\%$ 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