The cost per pencil is:

1560/30 = 52

Build revenue function:

Revenue = Number of Pencils * Sales Price (s)

Revenue = 30s

The profit equation is:

Profit = Revenue - Cost

Given profit is 180 and cost is 1560, we have:

30s - 1560 = 180

To solve for s, we type this equation into our search engine and we get:

s = 58

This is sales for total profit. The question asks profit per pencil.

Profit per pencil = Revenue per pencil - Cost per pencil

Profit per pencil = 58 - 52

Profit per pencil =

**6**