At the beginning of Year 1, a company amends it defined benefit pension plan for an additional $500,000 in prior service cost. The amendment covers employees with a 10-year average remaining service life. At the end of Year 1, what is the ending balance of accumulated other comprehensive income (ignore income tax effects)? $500,000 credit O $450,000 credit O $500,000 debit O $450,000 debit