An employee receives a commission from a percentage of sales, paid monthly. The employees comission basis is $100 per month. The final payment at the end of the quarter is adjusted for total performance for the quarter ((quarterly sales / 10500 [the quarterly goal] * $300 [the 3 month comission basis]) - Jan & Feb payments.

If the January and February sales total 10,550 and total payments were 284.33, and the quarterly goal is 10,500 units with a $300 quarterly commission basis, how many sales are needed to earn $100 for the payment in March? Show the steps and the formula required to calculate the sales needed.

Month	Goal (units)	Actual (units)	Percentage	Comission Basis	Payment
Jan	5000	5050	101%	$100.00	$101.00
Feb	3000	5500	183%	$100.00	$183.33
Mar	2500	#?	%?
Quarter	10500	#?	%?	$300.00	$100.00