How much does a 12 1/8 pound package weigh after 3 3/4 pound book is taken out. please help will mark brainest I wrote the last one wrong

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?