Final answer:
The marginal cost of providing monthly services for a 6th patient is calculated by subtracting the total cost for 5 patients from the cost for 6 patients, resulting in $750.
Step-by-step explanation:
To find the marginal cost of providing monthly services for an additional patient, you would subtract the total cost for 5 patients from the total cost for 6 patients. The total cost for 5 patients is $2,500 and for 6 patients is $3,250.
Therefore, the marginal cost for the 6th patient is:
$3,250 (cost for 6 patients) - $2,500 (cost for 5 patients) = $750.
Final answer: The marginal cost of providing monthly services for a 6th patient is $750. This is found through a simple subtraction of the total costs, which gives the additional cost incurred when the 6th patient is added.