Tapioca pearls are used as input in bubble tea. If the price of tapioca flour increase, it will lead to an increase in the cost of producing pearls. This will further cause the cost of producing bubble tea to increase.
At the same cost, the firms will be able to produce a lesser quantity. This will cause the supply curve to shift to the left. So, an increase in the price of tapioca pearls causes the supply of bubble tea to decrease.
