I do not have the rate for Dagupan Buses but however I do have the rate for Victory Liner buses.
They are one of the largest bus companies in the Philippines so you can use their rates as the bench mark. Since the Dagupan Bus Company is based in Cubao, your originating point will be Cubao, Quezon City.
The fare from Cubao to Baguio is 450php one way. Their schedule is as below: