The POD costs are $0.25 per double-sided tile. For the sets in this Kickstarter it depends on the final tile count.
Dwarven Tomb is 44 tiles but only counts as 22 tiles since they are double sided with the detailed and basic versions of each tile back-to-back. Likely there will be some tiles that would be good to have a couple copies of so probably 32 tiles.
Dwarven Tombs: $8.00
Dungeon Core Set: $10.00
Dungeon Encounter 1: $2.50
Dungeon Expansion 1: 3.00
Dungeon Expansion 2: 3.00
Dungeon Expansion 3: $6.25
Total for printing all sets: $32.75 + shipping
These costs are all estimates but should be accurate within $0.50