PRACTICE | Cost-Volume-Profit Analysis with Do-All Software Mary Frost plans to sell Do-All Sofware, a software package, at a heavily attended two-day computer convention in Chicago. Mary can purchase this software from a computer software wholesaler for $140 per package. She plans to sell the packages for $200 each. To participate in the convention, Mary has to pay a rental fee for her booth. She has the option of paying either A. A flat fee of $2,100, or B. A fat fee of $1,400 plus a commission of 5% of the revenues she eams selling software at the convention. How many packages must be sold if Mary opts for Option B and wants to earn a profit of $800 ? Determine the breakeven point in sales dollars if Mary opts for Option B and wants to eam a proft of $2,000