Uncompleted Contracts (Tables)

9 Months Ended

Sep. 30, 2019

Costs, estimated earnings and billings on uncompleted contracts are as follows:

	September 30,			December 31,
	2019			2018
Revenue Recognized	$	889,800		$	499,600
Less: Billings to date		(515,500	)		(185,300	)
Costs and estimated earnings in excess of billings on uncompleted contracts		374,300			314,300
Billings to date		2,381,500			1,642,600
Revenue recognized		(2,162,100	)		(1,172,400	)
Revenue contract liabilities	$	219,400		$	470,200