need the answer for number 3 please!!

3. You rent an 8-passenger van for a week to transport 8 people to a convention 1,240 miles away. The rate is $399.00 a week with 1,500 free miles and $0.25 per additional mile. The CDW fee is $165.00 for the week, and the estimated gasoline cost is $600.00. Determine the round-trip cost a) for the total rental, b) per mile, and c) per person