I'm no guru in Excel either.  I found the function on the Internet.  
Basically it takes a cell in which time is entered and gives the time back,
rounded to the nearesr quarter-hour.  For example if a user enters 11:07, it
would give you back 11:00.  If a user enters 11:08, it would give you back
11:15.  It allows you to write a formula and it would function as a time
clock.  Most of our users feel the need to enter the exact time the are in
and out.  But, the accounting department need to know the time they worked to
the quarter-hour.  We had a time clock at one point and could not afford the
service.  So, I gathered my powers of Internet search and wrote the lengthy
formula that rounds BOTH times (in and out) separately, calculates the
difference, and returns the total (in a decimal format).  None of which is
code, all formula; if's, vlookup's, lots of brackets, etc., etc.  Although I
am more than confident in my powers of deduction and logical reasoning, I
have 0 powers in coding and therefore none of it is logical to me.

While I appreciate your attempts to make things more lucid, I certainly
understand that you need to make a livin and can only offer limited support
in this "free" forum.  Please be mindful that I work as the sole IT support
for a small non-profit that cannot spend money to research a product that was
given to us in-kind by MS.  This is just my attempt to make things easier on
employees so they can spen more time investing in our mission, thus bringing
down costs and elevating productivity.

Thank you bunches for all of your wonderful insight.
Richard