Varkon Extended Library
takes a string , finds an operand, sums string
part(ref, evaluate(input, rtn_flt));
STRING input*132;
VAR FLOAT rtn_flt;
translates "4x5" to a float value of 20
translates "4 1/2" to a float value of 4.5
translates "10'-4 1/2" to a float value of 124.5