I didn't find enough information about mastering a catalog, so I counted myself
As soon as the new catalog came out, Emerald Isle, I did a research and here's what I found out.
I worked with 40 slots on 8 hours catalog (Emerald Isle)
You need a total of 124 orders to complete the order and it took me a little over 4 days to finish.
# of items ordered to reach next level:
LV 0 to 1 12
LV 1 to 2 22
LV 2 to 3 30
LV 3 to 4 60
Total orders accumulated:
LV 0 to 1 12
LV 1 to 2 34
LV 2 to 3 64
LV 3 to 4 124
Using Hangers:
You get 1 hanger for ordering, and 3 hangers for stocking; for a total of 4 hangers per item ordered
LV 0 to 1 45
LV 1 to 2 90
LV 2 to 3 120
LV 3 to 4 240
Total # of Hangers Accumulated:
LV 0 to 1 45
LV 1 to 2 135
LV 2 to 3 255
LV 3 to 4 495
Therefore, you need to order 496 (124 order * 4 item/catalog) in order to master a catalog.
Total # of hours required to obtain mastery:
124 order * total items in catalog * time it takes to order 1 item / # of slots you used
In Emerald Isle:
Total items in catalog: 4
Time it takes to order 1 item: 8 hours
# of slots I used: 40 slots
124 * 4 * 8 / 40 = 99.2 hours
A little over 4 days...
Here are screenshots:
After 10 orders complete
After 20 orders complete
After 30 orders complete
After 40 orders complete
After 50 orders complete
After 60 orders complete
After 70 orders complete
After 80 orders complete
After 90 orders complete
After 100 orders complete
After 110 orders complete
After 120 orders complete
After 124 orders complete (mastery)
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