Apprentice Mousetraps has developed the Magic Mouse Trapper. The companys fixed costs are $$30,000$ per week. The product sells for $$20.$ Initially, the company estimated that it would cost $$5$ per unit to make each mousetrap. After one week in production, however, the company realized that its actual cost to make each unit was $$7\mathrm{.}25.$ What are the weekly volumes that a$)$ Apprentice originally thought it needed to produce to break even, and b$)$ Apprentice actually needs to produce to break even?