Receivables: (Details) - USD ($)	Dec. 25, 2021	Dec. 26, 2020
Current receivables
Trade	$ 29,300	$ 16,700
Royalty	1,013,800	1,518,000
Other	60,300	47,200
Total current receivables	$ 1,103,400	$ 1,581,900

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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