Answer:
a. 4,220 units
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:
[tex]\$109,720 = \$26*x\\\\x= \frac{\$109,720 }{\$26}= 4,220\ units[/tex]
The break-even point is 4,220 units.