Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Sales	$ 6,730,268	$ 8,224,395	$ 12,453,663	$ 15,311,259
Cost of goods sold	4,823,516	6,040,799	9,073,386	10,940,788
Gross profit	1,906,752	2,183,596	3,380,277	4,370,471
Expenses
Engineering	107,072	140,497	267,425	268,793
Selling	397,631	510,965	860,390	1,042,426
General and administrative	1,233,281	1,099,132	2,463,775	2,082,804
Total expenses	1,737,984	1,750,594	3,591,590	3,394,023
Income (loss) from operations	168,768	433,002	(211,313)	976,448
Other income (expense):
Interest expense	(159,768)	(147,196)	(321,772)	(259,010)
Other	(14,270)	131,613	(9,221)	143,607
Total other expense	(174,038)	(15,583)	(330,993)	(115,403)
Income (loss) from continuing operations before income taxes	(5,270)	417,419	(542,306)	861,045
Income tax expense (benefit)	(613)	87,658	(113,391)	180,989
Net income (loss) from continuing operations	(4,657)	329,761	(428,915)	680,056
Discontinued Operations (Note 3)
Loss from discontinued operations before income taxes	(38,028)	(29,237)	(87,930)	(39,471)
Income tax benefit	(9,345)	(6,140)	(18,465)	(8,289)
Net income (loss) on discontinued operations	(28,683)	(23,097)	(69,465)	(31,182)
Net income (loss)	$ (33,340)	$ 306,664	$ (498,380)	$ 648,874