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Selected financial information for MANGO Manufacturing is presented in the following table (000s omitted). Sales revenue $4700 Purchases of direct materials $440 Direct labor $520 Manufacturing overhead $640 Operating expenses $730 Beginning raw materials inventory $280 Ending raw materials inventory $230 Beginning work in process inventory $320 Ending work in process inventory $430 Beginning finished goods inventory $330 Ending finished goods inventory $260 What was operating income? $3970 $2730 $4700 $2360