Explanation:
To start we can say that the 463.02 is negative because he owes this money, he does not have it.
Now, he started by returning two items, this gives you the money back, so you can add these two numbers together
52.11+53=105.11
Now we can take this number and add it to the -463.02
105.11+-463.02=-357.91
Next Joseph buys two new things, which removes money.
First add these two numbers together again
36.34+36.36=72.7
Now just take this number and subtract it from the new number
-357.91-72.7=-430.61
-430.61 is your new total