A group of friends went to lunch. The bill, before sales tax and tip, was $37.50. A sales tax of 8% was added. The group then tipped 18% on the amount after the sales tax was added. What was the amount, in dollars, of the sales tax?

Question

A group of friends went to lunch. The bill, before sales tax and tip, was $37.50. A sales tax of 8% was added. The group then tipped 18% on the amount after the sales tax was added. What was the amount, in dollars, of the sales tax? 
A $62.05 
B $44.25 
C $48.10 
D $47.79
Can someone help me again and last question thanks!

Ms. Sue · Answer

37.5 * 1.08 = $40.50 with tax. 40.5 * 1.18 = $_______ with tip