please help, with 20-24. please show all work so I know how to do the problems. thankyou.

Answer the following questions using the information below:

Tally Corp. sells software packages during the recruiting seasons. During the current year, software package sales were $440,000, variable costs per unit were $10, fixed costs were $48,000, and total costs were $158,000.

14) Calculate the total variable costs $ 110,000

15) Calculate the units sold $ 11,000

16) Calculate the break -even sales $ 64,000

17) Calculate the margin of safety in units 9,400

18) Calculate the contribution margin ratio is 0.75=75%

19) The Degree of Leverage is 1.17

20) If sales increase by $60,000, operating income will increase by $______________.

21) If sales revenue increases by 20%, operating income will increase by (use DOL) $_______________.

22) What target sales dollars are required to make net income of $211,500 if the tax rate is 25% $_____________

23. If the sales price decreased by 10%, what is the contribution margin per unit? $ _______

24 If the sales price increased by 10%

a. What is the contribution margin per unit? $________

b. what target sales dollars would be required to make net income of $350,000 when the tax rate is 25% $_________________