(Table: Customer Valuations for Lawn Services I) The table shows customer valuations for different lawn services. The marginal cost of lawn cutting is $400 and the marginal cost of

(Table: Customer Valuations for Lawn Services I) The table shows customer valuations for different lawn services. The marginal cost of lawn cutting is $400 and the marginal cost of fertilizing is $200.
Suppose the lawn service prices its services separately. In this case, the company should charge $____ for lawn cutting.
A) 800
B) 600
C) 400
D) 250