Product X comes in 3 sizes: small, medium, and large. In a month, the following numbers of each were sold. What percent of sales is each size?
a) Small: 14, Medium: 25, Large: 11
b) Small: 40%, Medium: 30%, Large: 20%
c) Small: 28.57%, Medium: 50%, Large: 21.43%
d) Small: 25%, Medium: 45%, Large: 30%
