Answer:
8. 6 shirts ($61)
9. $61
10. 32 shirts (256)
Explanation:
To get the answers you could either graph the rates or create a table. Creating a table is easier to understand, graphing is much faster. I attached pictures of the graphs. Y axis being amount of $ and x axis being the amount of shirts.
Second graph is for questions 8 and 9
first graph for question 10
The difference is that i took out shipping for question 10
Table explains 8 and 9 more easily