User blog comment:Hayashi H/Spring 2016 Event Guide/@comment-26875327-20160524110420/@comment-26486243-20160524205516

They're the resource levels I have at the end of the milestone relative to the previous milestone. The actual resources I have at each point are written in the very first section. These are 'overall' numbers and are affected by quests and resource expeditions.

It's not fully precise, but the idea is just to give a rough indication of the relative costs - and being precise with the 'actual resources used' would require way too much effort.