Can someone help me on this question?

Question

The threshold limit of vanillin is 2.0 x 10^-11 g per liter of air. If the current price of 50 g of vanillin is $112, determine the cost to supply enough vanillin so that the aroma could be detected in a large aircraft hangar with a volume of 5.0 x 10^7 ft^3.

can someone explain this to me step by step. i would really appreciate it. thank you.

Answer 1

5.0 x 10^7 ft^3.   @ 28.32 liter / Ft3 = 1.42e9 liter

1.42e9 liter @ 2.0 x 10^-11 g per liter of air = 0.0284 grams

0.0284 grams @ $112 / 50 gram = $0.0636

your answer is 6.4 cents