Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Sales	$ 5,710,228	$ 5,445,732	$ 11,110,800	$ 10,471,656
Cost of goods sold	3,988,170	4,451,016	8,346,063	8,499,779
Gross profit	1,722,058	994,716	2,764,737	1,971,877
Expenses:
Engineering	122,127	122,593	243,518	232,445
Selling	543,958	401,224	1,016,933	856,908
General and administrative	907,192	1,395,515	1,724,028	2,276,837
Total expenses	1,573,277	1,919,332	2,984,479	3,366,190
Income (Loss) from operations	148,781	(924,616)	(219,742)	(1,394,313)
Other income (expense):
Interest expense	(74,787)	(77,246)	(133,471)	(160,520)
Other	6,984	4,698	34,642	13,897
Total other income (expense)	(67,803)	(72,548)	(98,829)	(146,623)
Income (Loss) before income taxes	80,978	(997,164)	(318,571)	(1,540,936)
Income tax expense (benefit)	16,888	(195,444)	(67,423)	(302,023)
Net Income (Loss)	$ 64,090	$ (801,720)	$ (251,148)	$ (1,238,913)