Answer and Explanation:
The computation is shown below:
Total fixed costs is
= depreciation + advertising + insurance
= 1224 + 153 + 1683
= $3060 per month
Now
Total variable cost per unit
= weed + direct labor + fuel
= 10 + 8 + 2
= $20/ per lawn
Now
Contribution margin ratio = (sales per unit - variable cost per unit) ÷ sales per unit
= ($50 - $20) ÷ 50
= 60%
Now
Breakeven sales is
= fixed costs ÷ contribution margin ratio
= $3,060 ÷ 60%
= $5100
And,
Breakeven sales units is
= breakeven sales ÷ sales per unit
= 5100 ÷ 50
= 102 lawns