SUBTRACT Statement - Format 1

1 SUBTRACT
2+ 
2.0 identifier-1
2.0 literal-1
3 FROM
4+ 
4 identifier-2
4.1? ROUNDED
5? ON
5.1 SIZE ERROR imperative-statement-1
6? NOT
6.1? ON
6.2 SIZE ERROR imperative-statement-2
7? END-SUBTRACT