. A partially completed pension spreadsheet showing therelationships among the elements that constitute Carney, Inc.’sdefined benefit pension plan follows. At theend of 2018, Carney revised its pensionformula and incurred a prior service cost of $100 million. At theend of 2019, the pension formula wasamended again, creating an additional prior service cost of $200million. At the beginning of 2020, $400million prior service cost was incurred. At thebeginning of 2021, $300 million priorservice cost was incurred. In 2018 - 2021, the actuary’s discountrate remained 10%, and the average remaining service life of theactive employee group remained 10 years. The expected rate ofreturn on assets was 10% in 2019, and increased by 1% eachyear.

1. Fill in blanks in the 2019 pension spreadsheet.

2019 Pension spreadsheet ($ in millions)	(PBO)	Plan Assets	Prior Service Cost–AOCI	Net Loss (Gain) –AOCI	Pension Expense	Cash	Net Pension (Liability) / Asset
Balance, Jan. 1, 2019	(25,000)	20,000	100	4,500			(5,000)
Service cost	(800)
Interest cost
Prior Service Cost
Expected return on assets
Adjust for: Gain (loss) on assets
Amortization of: "Prior service cost-AOCI"
Amortization of: "Net Loss (Gain)-AOCI"
Gain (Loss) on PBO	7000
Cash funding						(1,000)
Retiree benefits	950
Bal., Dec. 31, 2019		22,450	290	(3,100)	1,510