How would you estimate daily requirements in practice (i.e., how would you get the data for Exercise

How would you estimate daily requirements in practice (i.e.,
how would you get the data for Exercise 6.6)?

Exercise 6.6

Consider the following items to be stored in a unit load
(pallet) storage area, stacked 1-high. Determine the number of pallet locations
required for dedicated, randomized, and class-based storage for a 90% and then
95% service level. Assume that for class-based, there are three classes (A =
{I1, I2}, B = {I3}, C = {I4, I5, I6}). Daily storage requirements provided in
the following table are normally distributed.