Bacon

You need to take the bacon from the bacon factory to the store. Bacon cars give $2,200 (20 cars gives a total of $44,000 per delivery).
=== To indicate whether the refrigerator has bacon in it or not depens on if it displays a massive image of bacon on the side or not (the same is for ice cream which also uses the refrigerator car). The shop is located in the city and the bacon factory is located just south east of the engine shed. ===