Dave rented a limousine for his wife's birthday. the hourly rate is $70. they used the limousine for 4 hours, plus dave gave the driver a 10% tip. how much did he spend in total for the hourly charges plus tip?
a $336
b $357
c $308
d $252

So you do 70 x 4 = 280 plus he gave the 10% tip so we add 10% that would be 28 as 280 divide by 10 is 28                                       280+28=308                                                                   your answer is c                                                   hope i helped