9. A company rents out 15 food booths and 20 game booths at
the county fair. The fee for a food booth is $100 plus $5 per
day. The fee for a game booth is $50 plus $7 per day. The fair
lasts for d days, and all the booths are rented for the entire
time. Write and simplify an expression for the amount in
dollars that the company is paid.