Highlighting Duplicate cells?

Sorry!
I deleted the post that was here by accident. But here is the form again:

FORM1
NAME |LEVEL| PRICE
EXAMPLE 1 B £1
John 2 S £1
XXXX G £1
EXAMPLE 2 B £1
EXAMPLE 1 B £1
Metal 3 D £1
Metal 4 S £1

Basically, it should be something like > if level =B and name has a duplicate , then highlight in red. Once i figure this one out, i want to do it for other levels. for example, a name with Level S can only be written twice. and there are other levels too.