Michelle just had a baby and needs to buy supplies from the store. she buys b bottles, d diapers, f formula, and p pacifiers. the expression for the cost (in dollars) for her purchase is represented by the function 10b + 6d + 8f + 2p. which statement is not true?

a. the term 10b represents the cost for 10 bottles.
b. the coefficient 6 represents the cost for each diaper.
c. the term 8f represents the cost of formula.
d. the coefficient 2 represents the cost of each pacifier.