Charlie knows that the sales mix as a percentage of units sold is 20% for a hand-carved chess set and that it sells for $700. The sales mixas a percentage of units sold is 80% for a hand-carved backgammon set and it sells for $300. If Charlie knows that the companywide break-even point is 4.200 total units, how many chess sets and how many backgammon sets must sell to achieve break even? He must sell 840 chess sets and 3,360 backgammon sets in order to break even. He must sell 1,400 chess sets and 2,400 backgammon sets in order to break even. He must sell 140 chess sets and 240 backgammon sets in order to break even. He must sell 3,360 chess sets and B40 backgammon sets in order to break even