Shareholders' Equity (Deficit): (Tables)

12 Months Ended

Dec. 25, 2021

Shareholders' Equity (Deficit):

Schedule of stock option activity

				Weighted Average
				Remaining
	Number of	Weighted Average		Contractual Life
	Shares	Exercise Price		(years)	Intrinsic Value
Outstanding, December 29, 2018	639,380	$	84.12	5.61	$	47,808,100
Granted	54,800		170.14
Exercised	(190,172)		57.41
Forfeited	(24,450)		138.13
Outstanding, December 28, 2019	479,558		101.78	5.79		45,283,200
Granted	45,100		163.87
Exercised	(108,170)		76.29
Forfeited	(23,000)		148.16
Outstanding, December 26, 2020	393,488		113.19	5.61		27,864,900
Granted	72,600		226.96
Exercised	(105,617)		78.78
Forfeited	(4,850)		158.48
Outstanding, December 25, 2021	355,621	$	146.03	6.32	$	39,320,571
Exercisable, December 25, 2021	219,266	$	114.16	4.73	$	28,004,239

Schedule of weighted average assumptions used in estimation of fair value of options granted

	Year Ended
	December 25, 2021			December 26, 2020			December 28, 2019
Risk free interest rate		1.13	%		0.45	%		1.85	%
Expected life (years)		6			6			6
Expected volatility		25.51	%		25.03	%		19.30	%
Dividend yield		3.13	%		2.33	%		1.38	%
Option fair value	$	37.90		$	28.25		$	30.96