Final answer:
Patricia has $500 of her total credit limit remaining after making the $500 purchase.
Step-by-step explanation:
To calculate how much of Patricia's total credit limit remains after making a $500 purchase, we need to subtract the purchase amount from her total credit limit.
Let's assume Patricia's total credit limit is $1000. Subtracting the purchase amount from her total credit limit, we get:
Total credit limit remaining = Total credit limit - Purchase amount
Total credit limit remaining = $1000 - $500 = $500
Therefore, Patricia has $500 of her total credit limit remaining after making the $500 purchase.