Q. A company makes four products that have the following characteristics: Product A sells for $75 but needs $20 of materials and $20 of labour to produce; Product B sells for $90 but needs $45 of materials and $20 of labour to produce; Product C sells for $110 but needs $50 of materials and $30 of labour to produce; Product D sells for $135 but needs $75 of materials and $40 of labour to produce. The processing requirements for each product on each of the four machines are explain how in the table.