Econo Nation started 2018 with no national budget debt or surplus. By the end of 2018, it had a budget surplus of $290 million; in 2019, it had a budget deficit of $431 million; in 2020, it had a budget surplus of $102 million, and the amount of its budget deficit or surplus in 2021 is unknown. If at the end of 2021 Econo Nation's national debt totaled -$48 million, determine thedeficit or surplus in 2021.

PeriodDeficit (-) or surplus (+)

Beginning of 2018 $0

End of 2018 $290 million

2019 $431 million

2020 $102 million

End of 2021 $_______million