Philp Neitson owns a fireworks stoee. Philp's fixed costs are $10,500 a month, and each fireworks assortment he sels costs, on average, $9. The average seling price for an assortment is $21. a. The break-tiven peint for Phalip's fireworks store is unis. (Enter your response rounded up to the next whole number.) b. Suppose Philip decides to expand his business. His new fxed expenses wil be $20,500, but the average cost for a frewons assortment will fall to just $6 due to Philip's higher purchase volumes. The new beak-even point is units. (Enter your response rounded up to the next whole number) c. At what volume level is Philp indifferent to the two capacty allernatives outined above? Philp's indference point is unis. (Enver your response rounded to the noavest whole number.)