HELP PLEASE. like 20 points. I'm really stuck.

1.     Choose a new car to buy. It can be a realistic purchase or your dream car. Figure out the costs of buying this car by filling in the blanks below. You can pay a 10 percent down payment, and your credit history is good enough to get a five-year loan with an interest rate of 5 percent.  
Make/Model:  
Manufacturers suggested retail price (MSRP):  
Cost of options (if applicable):  
Sales tax of 9 percent (the MSRP, plus any options, multiplied by 0.09):  

Total cost (the MSRP, options costs, and sales tax added together):  
10 percent down payment (total cost multiplied by 0.1):  

Amount needed to borrow (total cost minus the down payment):  

Estimated total interest paid (amount borrowed multiplied by 0.05, or 5 percent, per year for five years):  

Actual cost of the car (total cost plus the total interest paid):