For the following Gregory Bier Corp. data, find the starting solution and initial cost using the northwest-corner method. What must you do to balance this problem? ki7 TO FROM W X Y Z SUPPLY A $132 $116 $250 $110 220 B $220 $230 $180 $178 300 C $152 $173 $196 $164 435 Demand 160 120 200 230