Hide frees hipping for certain product category

Hi,

Not sure this question has been asked before.

In my online shop, I have set the free shipping for orders more than $150.

However, I do not want to include whiteboards for free shipping even though it costs more than $150.

So basically I want to exclude whiteboards from free shipping.

The issue I am facing is even I set the shipping charge for whiteboard class as $33 the free shipping option is visible on the top of $33.

I have another requirement which is shipping locations. I only need to ship the whiteboards to certain postcodes in my state. Not to the whole state.

I hope you understand my question. Please comment below if you have any queries. Thank you!