Question $2$: Transshipment $(6$pts$)$

$$Droning on$$ is a company that refurbishes crashed drones $($a surprisingly large market!$).$ They

buy $30$ damaged drones at each of two auctions each week. It then

transports the drones to repair shops it contracts with. When they are restored to Droning on$$s

specifications, they sell $20$ each to three different used drone outlets. There are various costs

associated with the transportation prices from each auction to each repair shop. Also, there are

transportation costs from the repair shops to the used drone outlets. Droning On is concerned

with minimizing its total cost given the costs in the table below.