Answer :
Your initial revenue is $3000, so that is what we will be subtracting from. Profit is defined as the amount of money left over after all other expenses are covered.
3000
-1500
-500
$1000
Since you have $1000 left, it is your profit.
3000
-1500
-500
$1000
Since you have $1000 left, it is your profit.