Final answer:
To calculate Charles Martinez's net profit, subtract his expenses from the sale price of the house. His net profit is $203,755.
Step-by-step explanation:
To calculate Charles Martinez's net profit on the house, we need to subtract all the expenses he incurred from the rental income and the sale price of the house.
First, let's calculate the total rental income for three years. Each half of the duplex was rented for $600 a month, so the total rental income is $600 x 2 = $1200 per month. Multiply this by 12 to get the annual rental income: $1200 x 12 = $14,400. Multiply this by 3 to get the total rental income for three years: $14,400 x 3 = $43,200.
Next, add up all the expenses: $4,400 + $2,317 + $68 + $6,960 = $13,745.
Finally, calculate the net profit by subtracting the expenses from the sale price of the house: $217,500 - $13,745 = $203,755.
Therefore, Charles Martinez's net profit on the house was $203,755.