デジタル形式で段階的に解決 ありがとう!! SOLVE STEP BY STEP IN DIGITAL FORMAT 6. The income from the sale of a certain pastry item is given by R = 450x + 50 and the production cost by C = 50x + 80. Determine the profit if 50 of these items are produced and sold in one day. Determine how many items to have no losses but no profits.