Answer:
a) $220
Explanation:
We must calculate the price of each
A, you mention it, it's a total of 2250.
B, in this case we have to add up the expenses the quarterly value is every three months, therefore, to calculate the value of one month we must divide by 3:
1800 + 150 + 120 + 1200/3 = 2470
the quarterly value is every three months, therefore, to calculate the value of a single month we must divide by 3.
Now the difference is:
2470 - 2250 = 220
therefore the answer is a) $220