Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Sales	$ 5,400,572	$ 5,025,924
Cost of goods sold	4,357,894	4,048,762
Gross profit	1,042,678	977,162
Expenses:
Engineering	121,391	109,852
Selling	472,974	455,684
General and administrative	816,836	881,322
Total expenses	1,411,201	1,446,858
(Loss) from operations	(368,523)	(469,696)
Other income (expense):
Interest expense	(58,684)	(83,274)
Other	27,657	9,199
Total other income (expense)	(31,027)	(74,075)
Income (loss) before income taxes	(399,550)	(543,771)
Income tax (benefit)	(84,312)	(106,579)
Net Income (Loss)	$ (315,238)	$ (437,192)