it would be nice to be able to choose an additional paid option such as a guarantee, insurance or another product which is linked to our offer. for example if you buy a sweater at 20 € then you can click just below to add in one click the ebook at 5 € in the payment basket.
for the events it can be a place + a meal or drink or sweeping paid option.
for the Booking it can be a cancellation insurance for example or an additional kit of sports equipment at 10 € in the price of the session. in any case it is optional, we can give it the name we want (possibly a picture) and a price. the upsell must intervene just before paying, after having filled in all the other information. 