please answer the question 7-10

USE THE FOLLOWING FOR QUESTIONS 7-10: 7. For ABC COMPANY, how many units have to be sold in order to carn an aftertax net income of $18,000 ? a. 21,750 b. 21,000 c. 21,250 d. 21,500 8. For ABC COMPANY, using one of the short-cut tricks that you leamed, assuming the sales desrease hv 25%, what would be the decrease in net income? 9. For ABC COMPANY, using the other short-cut trick that you leamed, assuming sales price decreased by 25%, what would be the decrease in net income? 10. Suppose ABC COMPANY makes the following changes in its cost structure variable costs increase by $3/ unit and fixed costs decrease 30%. What will be the effect on the breakeven point in units? HINT: Using the original data, first calculate the old breakeven point. A. Increase by 2,100 units B Increase by 2,000 units C. Increase by 2,200 units D. Increase by 2,300 units