From looking up your question, it seems you are using a different method for Item Creation. I use the methods as discussed in the latest
Treasure Companion. I use this system because it is much more complete and accurate, but that is my opinion. In the least, its methods of calculating the time and value are closer to the methods I developed for our world of Udava.
A) Work Cloth (1) - this is needed to make the robe.
B) Enchant Robe I (3) - this gives the robe a +10 DB bonus.
C) Armor III (14) - to increase the robes AT from 2 to 4.
D) Daily III (11) - to embed a 1st, 2nd, or 3rd level spell.
E) spell2embed (3) - this is the spell to be embedded. Since I do not know what the spell will be, I have used the highest level available, 3rd level.
Total Levels = 32.
Another way is to make the robe magical to begin with using the Work Magic Cloth spell (lvl 17) instead of the Work Cloth spell.
Time is calculted by using the below:
A) Normal Robe
1) 1 week to make the robe (Work Cloth)
2) 14 weeks for the Armor III (14 x 1)
3) 28 weeks for the Daily III and "spell2embed" ((11 x 2) + (3 x 2))
4) 9 weeks for the Enchant Robe I (3 x 3)
Total Time = 52 weeks.
B) Magical Robe
1) 17 weeks to make the magic robe (Work Magical Cloth)
2) 14 weeks for the Armor III (14 x 1)
3) 28 weeks for the Daily III and "spell2embed" ((11 x 2) + (3 x 2))
4) 9 weeks for the Enchant Robe I (3 x 3)
Total Time = 68 weeks.
Base Cost = (total levels of all spells necessary for the item) x (total time in weeks needed to create the item) in gold pieces.
Normal Base Cost = (32) x (52) = 1664gp.
Magical Base Cost = (48) x (68) = 3264gp.
Normal Selling Price = 1664 x 4 = 6656gp.
Magical Selling Price = 3264 x 4 = 13,056gp.
Hope this helps.
Of course, I could have missed on figuring what you were asking.
rmfr