Pension Data for Sewell Corporation Include the Following for the Current

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