Dropping Unprofitable Department Penin Corporation has four departments, all of which appear to be profitable except department 4. Operating data for 2019 are as follows: 12. Calculate the gross profit petcentage for departments 13 combined and for department 4. Department 13 Departinent 4 b. What effect would elimination of department 4 have had on total firm net income? (Ignore the effect of income tax.) The limims net insorne world beis