Answer:
See below & pic.
Explanation:
Now I understand the problem.
I corrected the answers I had given you, and wrote them in the blanks, and I filled in the rest a drew the graph.
See the picture below.
I think the question is not the cost and the earnings per hour. Rathe it means the cost and earnings as a function of hours.
I wrote those equations. Then I filled in the tables.
The breakeven point, when cost and earnings are equal, is at 6 hours, when both cost and earnings are $54. That is where the two lines intersect in the graph.