Quick Question FD & Westjet

[PandaBear & Boo]

Right now WestJet is offering what looks like discounted room & tickets. Does anyone know if I book these discounts and then FD drops will I be able to add the FD to it or would I have to cancel and just get the FD offer? Thanks for your help!

 

[2forMe]

Oh would wait as I am not sure how easy and what fees you would have to pay westjet