Transpo Rates:
1. Manila -> Sagada:
Manila to Baguio: Victory Liner Bus: Php 385.00
Baguio to Sagada: GL Bus: Php 200+.00
The Victory Liner Terminal is a quite far from the GL liner so i suggest you
a taxi. Taxi fare is around Php 35.00 to 50.00.

2. Sagada -> Manila
Sagada to Bontoc: PUJs: Php 35.00 - the last jeepney going to Bontoc from
Sagada is at 1pm.
Bontoc to Manila: Cable Bus: Php 600.00

3. Scenic Route:
Manila -> Baguio -> Sagada:
a. The highest point in Luzon - or is it the second highest point in Luzon. Nothing much to it really, its just the highest point...hehehe
b. Long and winding road - experience 6 or so hours of curves and whatnot.
c. Rice and Vegetable terraces

Sagada -> Bontoc -> Manila
a. Kadchog Rice Terraces
b. Bontoc Museum
c. Chico River
d. Bay-yo Rice Terraces
e. Banaue Rice Terraces

one last suggestion, if you are taking the Manila - Baguio - Sagada route, try to leave Baguio as early as possible. Landslides are becoming a usual occurence along the Baguio - Bontoc road due to the widening and road improvements being implemented.