Answer: Lionel earns a profit of $5 on his shrub trimming service, he should continue to offer this service.
Lionel is already making a profit of $10 for his standard package. In order to determine if Lionel should offer his shrub trimming business, we need to consider the revenues and costs of his shrub trimming service.
Additional Revenues from shrub-trimming :$15 ($40 - $25)
Additional Cost of shrub trimming : $10
Profit earned from shrub trimming $5 ($15 - $10)