4e Mechanics & Rules Discussion

[Raellus]

Regarding XP and skill progression, I have a clarifying question. IMHO, the rules aren't very clear on this.

Originally Posted by 4e Player's Manual, p40

To increase a skill level by one step costs a number of XP indicated in the table to the above right. You can only increase a skill level one step at a time. Learning a new skill (at skill level D) costs 5 XP

INCREASING SKILL LEVEL
TARGET LEVEL XP NEEDED
A 20
B 15
C 10
D 5

So, does it cost a TOTAL of 15 XP to advance from D to B, or does it cost 10 to advance from D to B, and then an additional 15 to advance from C to D?

I think it's the latter, but I'm not sure. What's your interpretation?

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