Shareholders' Equity (Deficit): (Tables)

9 Months Ended

Sep. 28, 2019

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	29,250		164.84
Exercised	(65,292)		45.87
Outstanding, September 28, 2019	603,338	$	92.17	5.37	$	50,698,600
Exercisable, September 28, 2019	440,813	$	74.76	4.28	$	44,717,900

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

	Nine Months Ended
	September 28, 2019			September 29, 2018
Risk free interest rate		1.98	%		2.73	%
Expected life (years)		6			6
Expected volatility		20.30	%		20.40	%
Dividend yield		1.26	%		1.17	%
Option fair value	$	32.65		$	31.44