3 TIMES 3 IS 9 MINUS 36 TIMES 36 WILL GET YOU THE ANSWER
So for the first problem;
You will take the cost of the glue $2.39 and take away the cost of the tape. Which is $1.99


So the answer to problem 1. will be $0.40 more.
For the second problem;
We will add the cost of the markers together, then add the cost of the paper onto that.



Leaving the second answer to be $12.39.
We need more than that lol