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BENEFIT PLANS
3 Months Ended
Oct. 31, 2020
Retirement Benefits [Abstract]  
BENEFIT PLANS
NOTE 11—BENEFIT PLANS

Net periodic benefit income and contributions to defined benefit pension and other post-retirement benefit plans consisted of the following:
13-Week Period Ended
Pension BenefitsOther Postretirement Benefits
(in thousands)October 31, 2020November 2, 2019October 31, 2020November 2, 2019
Net Periodic Benefit (Income) Cost
Service cost$— $— $12 $14 
Interest cost9,164 16,690 103 236 
Expected return on plan assets(25,965)(27,482)(26)(54)
Amortization of prior service credit— — (350)(350)
Amortization of net actuarial loss (gain)356 (315)(427)
Net periodic benefit income$(16,445)$(10,789)$(576)$(581)
Contributions to benefit plans$(375)$(4,100)$(950)$(100)

Pension Contributions

No minimum pension contributions are required to be made under either the SUPERVALU Inc. Retirement Plan or the Unified Grocers, Inc. Cash Balance Plan under the Employee Retirement Income Security Act of 1974, as amended, (“ERISA”) in fiscal 2021. The Company expects to contribute approximately $5.3 million to its other non-qualified pension plans and postretirement benefit plans in fiscal 2021.

Multiemployer Pension Plans
The Company contributed $11.9 million and $13.5 million in the first quarters of fiscal 2021 and 2020, respectively, to continuing and discontinued operations multiemployer pension plans.