Answer:
a. 4,220 units
Step-by-step explanation:
The break-even point occurs at the output level at which the total contribution of 'x' units sold equal Isaiah Company's ficed costs.
The number of units required to break-even, 'x' is:
![\$109,720 = \$26*x\\\\x= (\$109,720 )/(\$26)= 4,220\ units](https://img.qammunity.org/2020/formulas/business/college/42o8cwik0efzio4n6yp6jhxjg121o349ku.png)
The break-even point is 4,220 units.