I'm stuck... Shedz processes two varieties of kiwifruit – green and gold. Constraints on daily packing are as follows: • At most, 2 000 trays can be packed in total. • At most, 1 200 trays of green can be packed. • A minimum of 200 trays of gold need to be packed. • The ratio of the number of packed trays of green to gold must be no more than 5:2. The ratio of the profit per tray of the green variety to the gold is 12:13. Three types of tray are available; “all cardboard”, “cardboard / wood” and “all wood”, and Shedz wishes to determine how many of each type to purchase. The cost per tray is $1 for “all cardboard”, $2 for “cardboard / wood” and $4 for “all wood”. Shedz budgets $5 000 per day for purchasing trays. Shedz requires 2 000 trays per day, with between 10% and 30% of them being of the “all cardboard” type and as many as possible (subject to the above criteria) being of the “cardboard / wood” type. Using these criteria, determine Shedz’s daily requirement for each type of tray. How do I do this?