Smyth Window has an order for $4$ products $(101,202,303,404).$ The company can assemble any or all these window products in$-$house or outsource their production to a partner company. The number of units required for each product are provided in the Smyth Window worksheet along with the unit costs to assemble the products in$-$house or to buy the products from partner.

If Smyth assembles the products in$-$house, there are three stages in this process: pick, assemble, inspect. The amount of time required for each product type in each of the three stages is given in the worksheet. Each of these three stages has a limitation on the total time available for this order.

The goal for Smyth Window is to minimize the total cost of filling the order.

Which of the following are true?