Answer:

Explanation:
We know that Andre started with $100 dollars in his account.
We then see that he made a deposit of $ 70.65. Deposit means to add or put something in.
So we we have to add 70.65 into 100

Right now, Andre has $170 dollars and 65 cents in his bank account.
We then see that he bought a t-shirt of 19.95
So we then need to subtract Andre's current amount by 19.95

He now has $150 dollars and 70 cents in his bank account.