help with formula

[Art]

G12 has a dropdown menu in it, Y for YES, N for NO.
I12 is where the answers will go.
So if I pick N from the dropdown box in G12 , I need it to show a answer of 0
in I12. If I choose Y in cell G12 , I need it to use this formula
=Roundup(E12/300,0) so that it will give me a answer in cell I12. How to I
write this and get it to work?

 

[Max]

Place in I12: =IF(G12="Y",ROUNDUP(E12/300,0),0)