Help with IF Statement to Deal with Different Pricing Criteria

I have a basic formula as follows =L2+30 it's basically for calculating payment terms on invoices, based on 30 day terms.

However what I need help with is as follows:

If A2 equals "Abc Ltd" then the current formula of "L2+30" should be become "L2+60", but only if the text in A2 is ABC Ltd, otherwise it's plus 30.

I have tired but no luck.

Thank in advance for any help