FT_ASUM()
 Sum the elements of an array

 Syntax

      FT_ASUM( <aArray> [, <nStartIndex> [, <nEndIndex> ] ] ) -> nSum

 Arguments

     <aArray> is the array containing the elements to be summed.

     <nStartIndex> is the first array item to include,
     defaults to first element.

     <nEndIndex> is the last array element to include,
     defaults to all elements.

 Returns

     The sum of the elements of the array or the lengths of the elements.

 Description

     This function is to sum the elements of a numeric array or to sum the
     lengths of a character array.

 Examples

     FT_ASUM(aSubTotals)               // Sum the Entire Array

     FT_ASUM(aSubTotals, 5)            // Sum from the 5th Element On

     FT_ASUM(aSubTotals, , 10)         // Sum the 1st 10 Elements

     FT_ASUM(aSubTotals, 5, 10)        // Sum Elements 5-10

 Source: ASUM.PRG

 Author: David Husnian