Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Sales	$ 6,464,854	$ 5,503,622	$ 16,936,510	$ 15,375,104
Cost of goods sold	5,539,974	4,498,800	14,039,752	12,806,444
Gross profit	924,880	1,004,822	2,896,758	2,568,660
Expenses:
Engineering	128,813	116,153	361,258	380,139
Selling	370,236	378,811	1,227,144	1,119,428
General and administrative	939,125	814,702	3,215,963	2,466,073
Total expenses	1,438,174	1,309,666	4,804,365	3,965,640
Income (Loss) from operations	(513,294)	(304,844)	(1,907,607)	(1,396,980)
Other income (expense):
Interest expense	(73,422)	(89,208)	(233,942)	(274,649)
Other	58,847	24,082	72,744	61,997
Total other income (expense)	(14,575)	(65,126)	(161,198)	(212,652)
Income (Loss) before income taxes	(527,869)	(369,970)	(2,068,805)	(1,609,632)
Income tax expense (benefit)	(104,258)	(80,754)	(406,282)	(358,442)
Net Income (Loss)	$ (423,611)	$ (289,216)	$ (1,662,523)	$ (1,251,190)