Subject: mathqa
Question: a business executive and his client are charging their dinner tab on the executive ' s expense account . the company will only allow them to spend a total of 50 $ for the meal . assuming that they will pay 10 % in sales tax for the meal and leave a 15 % tip , what is the most their food can cost ?
Option: 
A: 41.63 $
B: 42.15 $
C: 39.52 $
D: 40.63 $
Answer: C