So, seems like something's screwy with this week's master missions. I did today's bonus quest that gives 140 food, and it did count for 140 general event item drops for that one mission, but it did not count towards collecting 50 food. Actually, it counted for the 50 stone mission, despite not giving any stones at all.
Just something to keep in mind that the individual mission requirements may not necessarily match the descriptions. But in the end, you probably still need 50 of each anyways.
Edit: lol I only just realized, the mission also says "obtain 150 of (any drop in general)" but the actual requirements say 140/200 right now. So even that one has different requirements than the description that was written for it.