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Investment in Leasing Operations: Leasing Income (Details) - USD ($)
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Leasing income    
Interest income on direct financing and sales-type leases $ 1,128,600 $ 2,182,500
Selling profit (loss) at commencement of sales-type leases 313,200 873,500
Operating lease income 435,400 638,300
Income on sales of equipment under lease 3,261,300 1,225,600
Other 732,700 235,400
Leasing income $ 5,871,200 $ 5,155,300