	Pension Benefits
	Three Months Ended
	December 28,			December 29,
	2019			2018
Interest cost	$	720		$	986
Expected return on plan assets		(320	)		(431	)
Amortization of net loss		862			866
Net periodic benefit cost	$	1,262		$	1,421

	Postretirement Benefits
	Three Months Ended
	December 28,			December 29,
	2019			2018
Interest cost	$	37		$	69
Amortization of prior service credits		(124	)		(124	)
Amortization of net (gain)		(197	)		(190	)
Net periodic benefit cost	$	(284	)	$	(245	)

The Partnership expects to contribute approximately $6,600 to the defined benefit pension plan during fiscal 2020, of which $1,015 was contributed during the three months ended December 28, 2019. The projected annual contribution requirements related to the Partnership’s postretirement health care and life insurance benefit plan for fiscal 2020 is $970, of which $211 was contributed during the three months ended December 28, 2019. The components of net periodic benefit cost are included in the line item Other, net in the condensed consolidated statements of operations.

The Partnership contributes to multi-employer pension plans (“MEPPs”) in accordance with various collective bargaining agreements covering union employees. As one of the many participating employers in these MEPPs, the Partnership is responsible with the other participating employers for any plan underfunding. As of December 28, 2019 and September 28, 2019, the Partnership’s estimated obligation to these MEPPs was $21,170 and $21,441, respectively, as a result of its voluntary full withdrawal from certain MEPPs.