We have the following data for a hypothetical closed​ economy: GNP​ = ​$12 comma 00012,000 Consumption​ (C) = ​$8 comma 2008,200 Government Purchases​ (G) = ​$1 comma 6001,600 Tax Collections​ (T) = ​$1 comma 6001,600 What is the value of private savings SP​? ​$nothing ​(Enter your answer as an integer. Include a minus sign if necessary.​)