Question about HP M477fdw Color LaserJet Pro

Cashbacks usually go like this:
-You buy the product (in this case the products) from the retailer of your choice.
-You fill out a form (name, address, information about the product and the retailer, bank details, proof of purchase,...) and send it to the manufacturer (in this case within 30 days of purchase).
-Wait until the money is transferred.

Therefore you pay the full price (449.-), you get 100.- back from HP later.
https://h41201.www4.hp.com/WMCF.Web...