We periodically repurchase, at the then-current market price, and cancel common stock issued to the Dorman Products, Inc. 401(k) Retirement Plan and Trust (the “401(k) Plan”). Under the 401(k) Plan, participants can no longer purchase shares of Dorman common stock as an investment option. Shares are generally purchased from the 401(k) Plan when participants sell units as permitted by the 401(k) Plan or elect to leave the 401(k) Plan upon retirement, termination or other reasons. The following table summarizes the repurchase and cancellation of common stock in the 401(k) Plan:

	For the Three Months Ended				For the Six Months Ended
	June 26, 2021		June 27, 2020		June 26, 2021		June 27, 2020
Shares repurchased and canceled		982		1,620		3,142		6,350
Total cost of shares repurchased and canceled (in thousands)	$	106	$	85	$	316	$	400
Average price per share	$	107.63	$	52.33	$	100.49	$	63.00

Our Board of Directors has authorized the repurchase of up to $500 million through December 31, 2022 under a previously announced share repurchase program. Under this program, share repurchases may be made from time to time depending on market conditions, share price, share availability and other factors at our discretion. The share repurchase program does not obligate us to acquire any specific number of shares. At June 26, 2021, $176.2 million was available for repurchase under this share repurchase program. The following table summarizes the repurchase and cancellation of common stock under the share repurchase program:

	For the Three Months Ended				For the Six Months Ended
	June 26, 2021		June 27, 2020		June 26, 2021		June 27, 2020
Shares repurchased and canceled		265,889		—		301,889		91,979
Total cost of shares repurchased and canceled (in thousands)	$	27,171	$	—	$	30,934	$	5,465
Average price per share	$	102.19	$	—	$	102.47	$	59.41