<s>[INST] A department store wants to package its shirts in a way that makes them appear as if they are neatly stacked on a shelf. However, there are not enough shelves to accommodate all the shirts, so they need to be folded and/or stretched to fit in the boxes. The department store wants to minimize the total cost of packaging.
The cost of folding a shirt is $x and the cost of stretching a shirt is $y. The cost of placing a shirt in a box is $z. The shirts come in three sizes: small, medium, and large, and there are mA small shirts, mB medium shirts, and mC large shirts. The following table shows the number of each size of shirt that can fit in a box:

| Shirt Size | Number of Shirts per Box |
| --- | --- |
| Small | 5 |
| Medium | 4 |
| Large | 3 |

The department store has mA=100, mB=120, and mC=80 shirts. What is the minimum cost of packaging all the shirts?[/INST]