5.5    Retrieval - Search, Get, Replace, and Sum

       You have two basic methods of retrieval, GET and SEARCH.
       Neither is case-sensitive: capitals and lower case can be
       freely mixed.  These commands can be accessed from the
       Main screen via their own individual buttons, or from the
       List screen via the 'Find recs' button.

       FIND also includes a search-and-replace command which can
       be used to locate and update, or simply locate, ANY text
       string - not just keywords; and a Sum function which acts
       like a simple calculator.        (NOT IN FREEWARE VERSION)

5.5.4  Sum                              (NOT IN FREEWARE VERSION)

       This function is located under 'Find recs' on the List
       screen, and enables simple "book-keeping".  It totals
       all numbers found in a specified line or lines - adding 
       positive numbers, subtracting negative numbers - and 
       presents its results on-screen when summing is complete.

       From there, you can load the result(s) into the Paste 
       buffer, for dropping into a record of your choice or for
       uploading into the Edit Buffer.

       ---------------------------------------------------------
       Note:  Summing is done by LINE.  For example, numbers 
       found in the Key line and numbers found in each of the 
       Note lines are all totalled SEPARATELY on relevant lines.
       ---------------------------------------------------------

       A positive number is any numeric string (set of characters)
       that isn't negative.  It must start with a digit, ie "123",
       "123.4" or "0.1234" - ".1234" is interpreted as "1234".

       Negative numbers are numbers that are IMMEDIATELY
       followed by whatever string you choose to enter into the
       field beside the "Dr" button on the Sum panel.  This can
       be up to 2 characters.  By default it is a minus sign (-).

       You can click the "$" button to enter a string of up to
       three characters in the field beside that - a currency
       symbol.  If you do, ONLY numbers immediately PRECEDED by
       exactly that symbol will be "seen" by Sum.  If no currency
       symbol has been entered, ALL numbers will be summed.

       Neither of the above symbols (negative or currency) are 
       case-sensitive: "DR", "dr" & "Dr" are all the same, as is
       "$US", "$Us" & "$us" (or "UK" and "uk"; or "DM" & "Dm").

       Decimal points (eg "5.02", "$5.99") are indicated by a "."
       Imbedded commas ("4,321") are ignored.

       ---------------------------------------------------------
       PRECISION:  As with a calculator, there is a limit to the
       accuracy of numbers.  Sum can handle a range of 2.9x10-39
       thru 1.7x10+38 to 11 digits precision.  In other words,

            123456789014     becomes  12345678901     and
            0.0123456789016  becomes  0.012345678902

       (1.7x10+38 means 1.7 multiplied by 1000.. [to 38 zeros];
        2.9x10-39 means 2.9 multiplied by 0.00..01 [39 places].)
       ---------------------------------------------------------

       Numbers exceeding 11 digits will be rounded when read in,
       and totals exceeding 11 digits are rounded for display.
       (If the final digit is '5', the number is rounded down.)

       NB: Rounding and overflow errors on input aren't reported, 
       and may cause inaccuracies.

       If the total is too large to be handled, it is followed
       by an "e" (for "error", or "exponent"), eg:  

            1234567890156 displays as "1234567890200e"

       Currency totals are always given to two decimal places, 
       padded if necessary.

