Can you purchase lower price products and high price products together with an argos card?

[LUHG!]

The title is kinda mis-leading as I didn't know how to word my question into a small enough title, anyway on with the question:

I am gonig to purchase the new Xbox from Argos once it hits the UK and I presume like all high priced products it will have the buy now pay later option, my question is if I buy that on the buy now pay later sceme (Lets just say it's 6 months later, I can't quite remember) will I also be able to add some small shit into the 'deal' like a few games and not pay for those til I have to pay for the xbox in 6 months times too as I got them all together with my Argos card?

Sorry if it's confusing, I just thought I would ask here and see if anyone has had experiance with one of these store cards before, I am sure the question will be answered in their small print somewhere but fuck looking through all that.

Thanks.