Question 283808
If the total budget for the 3 months was $252,000, and the monthly budget remained the same for the 3 months, then the monthly budget had to be $252,000 / 3 = $84,000 per month.


If they spent 90% of their monthly budget the first month, then they spent .9 * $84,000 = $75,600 the first month.


$84,000 - $75,600 = $8,400.


They spent $8,400 below their budget for the first month.