$8.$ What is the weighted average contribution margin rate for the remaining six clothing lines, if the lowest performing clothing line is removed? Calculate the additional break$-$even sales dollars required to cover only the new fixed costs incurred using the average contribution margin rate. Hint: consider the lost contribution margin from the lowest performing clothing line as one of the new fixed costs. $($the reading says there is a $600$k sales revenue for the year but with the classic shirt gone it should becoem $570$k it also mentions there is $1$ fixed cost only of a rental unit that is $$31200$ for the year