13. (15 points) If number $A$ is increased by 2, then its product with number $B$ is 60 more than the product of $A$ and $B$; if number $A$ remains unchanged and number $B$ is decreased by 3, then their product is 24 less than the product of $A$ and $B$. Therefore, if number $A$ is increased by 2 and number $B$ is decreased by 3, how much more is their product compared to the product of $A$ and $B$?