Pension data for Sewell Corporation include the following for the current calendar year: Discount rate, 8% Expected return on plan assets, 10% Actual return on plan assets, 12% PBO, January 1$620,000,000 Plan assets, January 1 630,000,000 Plan assets, December 31 670,000,000 Benefit payments to retirees, December 31 55,000,000 Required: Assuming cash contributions were made at the end of the year, what was the amount of those contributions?