Final answer:
Sam has $10.26 left over after purchasing the item.
Step-by-step explanation:
To determine how much money Sam has left over after purchasing an item for $9.93, we need to subtract the cost of the item from the amount of money he had initially.
Starting with $20.19, subtract $9.93:
$20.19 - $9.93 = $10.26
Therefore, Sam has $10.26 left over after purchasing the item.