Westbucks

Westbucks are the premium currency in the game. Use them wisely as you only have a limited amount before you would need to purchase more with real money.

The game does give you some free Westbucks as you play through the game, not not a great amount.

I would recommend using Westbucks only for increasing the usefulness of a building over time, not to just speed up one batch of an item, as if you increase the usefulness of a building then it will be good for the whole game, not just one batch of an item.