Quarters and Total days calculations not working correctly on a Form/Query

I have a table that I created from a Query out of SQL.

tblFiscalQuarters_2
The Data looks where my data like similar to this:
FStart       FEnd              Year              FYear      FQ      Days       Vacation       Weekends      Total
1/1/2012       2/29/2012      2012      FY2012      FQ3      60              2                 17                 41
3/1/2012       5/31/2012      2012      FY2012      FQ4      92              1                 26                 64
6/1/2012       8/31/2012      2012      FY2013      FQ1      92              1                 26                 64
9/1/2012      11/30/2012      2012      FY2013      FQ2      91              3                 26                 62
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SECOND TABLE:
Copy Of tblProjects1
ProjectID
Project
FStartQ
FEndQ
Days
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On my form in Access I will select:
ProjectID
Project
FStartQ:
FYear (ComboBox pulling from tblFiscalQuarts), then FQ (populated by VB Code) , then Days (populated by VB Code).
FEndQ:
FYear (ComboBox pulling from tblFiscalQuarts), then FQ (populated by VB Code) , then Days (populated by VB Code).
of days(populated by VB Code).
Both Days fields total (VB Script) and are stored the main table.

DAYS:
Days need to automatically sum (FEndQ.Days + FStartQ.Days) and store in main table.
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However if my users choose FY2013, FQ1 and FY2014 FQ1, it is not totaling all the days in the range.
Plus my VB Code is concatenating the numbers and not subtracting them.


I attached the DB to make it easier to understand what I am doing.
Database1.mdb