NUM - Convert to a number 
Convert Operand 2 into a number and store result in Operand 1
Statement:			Wage Scale Codes are held in the database as data type Char. The UserCalc must check what the next scale step is by adding 1 to the current scale and then re-converting that back to a code to read its value from the database.
||Line||CMD||OT||Operand 1||OPER||OT||Operand2||OT||Operand3||If Goto||	Else GoTo
00010	LET	V	SCALE AS NUMBER	NUM	DB	SWS.SCALE_CODE			00020	
00020	LET	V	SCALE PLUS 1	ADD	V	SCALE AS NUMBER	N	1	00030	
00030	LET	V	SCALE AS CODE	CHAR	V	SCALE PLUS 1			00040	
00040	LET	V	MESSAGE	EQ	A	EE SHOULD BE AT SCALE	V	SCALE AS CODE	00050	
00050	MSG	V	MESSAGE						99999	
99999	EXIT								99999