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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net income	$ 601,217	$ 859,635
Adjustments to reconcile net income to net cash used in operating activities
Depreciation	640,848	660,489
Loss on disposal of equipment	0	16,081
Deferred income taxes	(46,000)	(72,000)
Changes in operating assets and liabilities
Accounts receivable	(1,194,243)	(746,528)
Inventories	(1,095,593)	(1,903,375)
Other current assets	(78,145)	64,595
Accounts payable	382,910	576,083
Accrued wages and salaries	235,473	394,494
Other accrued expenses	91,825	19,635
Unearned revenue and customer deposits	(75,713)	(169,245)
Net cash used in operating activities	(537,421)	(300,136)
Cash flows from investing activities
Capital expenditures	(211,703)	(345,213)
Proceeds from certificates of deposit	0	3,337,000
Purchases of certificates of deposit	0	(598,000)
Net cash provided by (used in) investing activities	(211,703)	2,393,787
Cash flows from financing activities
Cash dividends paid	(425,098)	(425,098)
Net cash used in financing activities	(425,098)	(425,098)
Net increase (decrease) in cash and cash equivalents	(1,174,222)	1,668,553
Cash and cash equivalents at beginning of period	2,036,954	2,567,731
Cash and cash equivalents at end of period	$ 862,732	$ 4,236,284

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