Answer:
B) $18,500
Step-by-step explanation:
To calculate the total cost of maintenance for this month we can use the following formula:
total costs = fixed portion + variable set up costs + variable unit costs
total costs = $3,000 + ($5 x 800) + ($0.50 x 23,000) = $3,000 + $4,000 + $11,500 = $18,500