Jason is keeping track of the amount of money that he spends on gas each month. Below are the amounts for last month:

$24.75
$30.25
$34.60
$38.90
What is the best estimation for the amount that Jason spent on gas last month?
A) 20 + 30 + 30 + 40
B) 20 + 30 + 35 + 40
C) 25 + 30 + 35 + 40
D) 30 + 30 + 35 + 40