Business Math
posted by Jessica .
Every week, a grocery store buys 30 gallons of milk at a cost of $1.58 per gallon. The store owner anticipates a 15% spilage rate. To achieve a 20% markup based on cost, what should be the selling price per gallon? Round to nearest cent.

1.58 * 1.15 = 1.817
1.817 * 1.2 = $2.18 
what do u multiply 1.817*1.2?

$2.18 isnt a choice.
Choices are:
A) $1.66
B) $1.98
C) $2.23
D) $2.32 
30 gals. with 15% spoilage=4.5 gals.profit(30x1.58)x1.2=56.88 gals.xpricexcost+20%56.88./.25.5gals.=markupfor remaining gals. no2.23 round 5gals.spoiled 56.88./.25=2.28 not it so round off 4gals. 56.88./.26=$2.1876 or $2.19