Ok, I will break this down for you.
Amulet of the Warrior:
+1 enhancement bonus to Strength (1000 gp)
+1 resistance bonus to Fortitude saves (1000 gp)
+1 delfection bonus to AC (2000 gp, being the most expensive part, this is doubled to 4000 gp.)
Market Price: 6000 gp
Cape of Hedge Mage
+2 to Spellcraft and Concentration (400 gp each, total 800 gp)
+1 resistance bonus to saves (1000 gp)
+1 dodge bonus to AC (2500 gp, again highest, 5000 gp)
Market Price: 6800 gp
I don't have my DMG right here at the moment so I may have gotten something wrong, but that should be about right.