adding like items from different sheets
 

Sorry if this has been answered, I looked at 342 different questions, did not
find one like mine.

Within a workbook, I have 6 sheets. I have an inventory sheet listing all
product by item number and description, ex: "80036" in a1, "36 inch box" in
b1, "80046" in a2, "46 inch box" in b2, etc.. A total of 1200 lines of
different items and descriptions. Then I have 4 quote sheets. Some rows for
each sheet use "VLOOKUP", so if the item number from the inventory sheet is
typed in appropriate col., description from inventory sheet is returned in
next col.. OK, next I have a sheet that is my picking ticket. On this sheet
I want a total by row of each item listed on the 4 quote sheets, so it shows
how many of the same item were listed on the 4 quote sheets. So if "80036"
is on quote sheet one with a value of 4, and on quote sheet two with a value
of 3, my picking tix would show that item number and description with a value
of 7 in the appropriate col.. Not all items will always be listed on quote
sheets. How do I set up the rows on picking tix to look for an item number
on the four quote sheets, if not found, go to the next item number, once an
item number is found, sum the total number listed for the found item number,
then on the next row, do the same thing without duplicating what has already
been found, until all 1200 items have been searched for? I think I am asking
too much..........TIA for any and all help.