egolf glider makes gasoline-powered golf carts. the selling price is 5000 each, and cost are as follows:

cost per unit total

DM 2000

DL 625

Variable OH 325

Variable Selling50

Annual fixed Production 250,000

annual fixed selling and admin 120,000

Golf Glider's income is taxed at a 40% rate

a. how many golf carts must golf glider sell to earn 600,000 after tax

b. what level of revenue is needed to yield an after-tax income equal to 20% of sales?