SOLUTION: I have been searching trying to find an example similar to he following problem, but I have been unable to locate anything close to help me understand how to answer this question.

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Question 1109683: I have been searching trying to find an example similar to he following problem, but I have been unable to locate anything close to help me understand how to answer this question.
You check around for the best deal on your prescription medicine. At your local pharmacy it costs $4.40 a bottle; by mail-order catalog it costs $3.87 a bottle, but there is a flat shipping charge of $4.00 for any size order; by a source found on the Internet it costs $3.99 a bottle and shipping costs $1.00 for each bottle, but for orders of ten or more bottles it costs $3.79 a bottle, and handling is $2.00 per order plus shipping costs of $1.00 for each bottle.
Find a formula that express each of these costs if N is the number of bottles purchased and C(p), C(c), and C(i) are the respective costs for ordering from the pharmacy, catalog, and Internet.
C(p) (N) =

C(c) (N) =

C(i) (N) =
Found 2 solutions by rothauserc, TeachMath:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
C(p)N = $4.40 * N
:
C(c)N = ($3.87 * N) + $4
:
C(i)N = ($3.99 + $1) * N
If N > 9 then C(i)N = ($3.79 + $1) * N + $2
:

Answer by TeachMath(96) About Me  (Show Source):
You can put this solution on YOUR website!
Cp(N) = 4.4N	

Cc(N) = 3.87N + 4	

Ci(N) = 4.99N, if N < 10	

        4.79N + 2, if N >= 10