Boston, Inc., planned and actually manufactured 250,000 units of its single product in 2020 , its first year of operation. Variable manufacturing cost was $19 per unit produced. Variable operating (nonmanufacturing) cost was $7 per unit sold. Planned and actual fixed manufacturing costs were $750,000. Planned and actual fixed operating (nonmanufacturing) costs totaled $400,000. Boston sold 120,000 units of product at $46 per unit. Read the requirements. Requirement 2. Boston's 2020 operating income using variable costing is (a) $2,000,000, (b) $1,640,000, (c) $1,250,000, (d) $1,650,000, or (e) none of these. Show supporting calculations. Begin by selecting the labels used in the variable costing calculation of operating income and enter the supporting amounts. Perform the calculations in this step, but select the correct operating income in the next step. (For amounts with a \$o balance, make sure to enter " 0 " in the appropriate cell.)