Answer:
She does not need to keep safety stock of flour and sugar as she has already sufficient flour and sugar to meet the demand.
Explanation:
The cup cakes require 9 cup of flour and 12 cups of sugar. She has completed 3 batches which means she has already used 27 cups of flour and 36 cups of sugar. If she has more orders in a day she will have to use flour and sugar from the stock she has kept in the bakery. She can still process approximately 37 more batches of cup cakes from the current inventory.