First youll need to add all the numbers together to get the cost of one tire 89.95 + 3.25 + 2.60 + 3.80 = $99.60 now that we know how much one tire costs, we can multiply the price of one tire by two to found out his final bill 99.60 x 2 = $199.20 Pete's final bill is $199.20 let me know if you have any other questions :)