1. BEN HAS AN AFTER-TAX PROFIT = $122,500 AT 5,000 UNITS. ASSUMING A CM/UNIT = $35 AND A TAX RATE = 30%, WHAT IS AFTER-TAX INCOME IF BEN SELLS AN ADDITIONAL 500 UNITS? 2. REX HAS VC/UNIT = $27 AND VC% = 60%. TOTAL FIXED COSTS = $270,000. HOW MANY UNITS MUST REX SELL TO MAKE AN AFTER-TAX PROFIT = $90,720? (ASSUME TAX RATE = 30%) 3. JACKSON HAS A SP/UNIT = $75 AND A VC% = 60%. WHAT IS JACKSON'S CHANGE IN AFTER-TAX NET INC ME IF 1 500 ADDITIONAL UNITS ARE SOLD? (ASSUME TAY RATE : 209%)