Final answer:
To calculate the change, subtract the total cost of the items from the amount of money you have. In this case, the change from a PHP500 bill is PHP281.10.
Step-by-step explanation:
To calculate the change you will get, you need to subtract the total cost of the items from the amount of money you have. In this case, the total cost of the items is PHP39.90 + PHP58.75 + PHP120.25 = PHP218.90. Therefore, the change you will get from a PHP500 bill is PHP500 - PHP218.90 = PHP281.10.