please explain steps:

Breakeven in Sales Dollars Willard Motors, Inc., employs 20 sales personnel to market its line of luxury automobiles for $65,000, and a 6 percent commission is paid to the salesper- s is considering a change to the commission arrangement where the son. Willard Motor company would pay each salesperson a salary of $1,500 per month plus a commission of 2 percent of the sales made by that salesperson. What is the amount of total monthly car sales at which Willard Motors would be indifferent as to which plan to select? (C adapted) MA