I'm Monty Whittaker's greatest fan. member of the K.R.E
There's also a couple of other fairly minor acting nuances that are interesting; Olivia sounds a bit like Camilla when she asks for the money back, an interesting sort of 'familial resemblance'. Morrie also says the word 'good' at the end with a certain awkwardness, as though he's not used to the word, which fits what we're coming to know about his character.
This isn't necessarily a plot hole, but it does seem a bit strange that they would stop doing the fundraising and rely totally on the phone call, which they candidly admitted sounded suspicious, after reaching the halfway mark. After all, if they made half the amount in a quarter of the time available, they could have kept going and presumably made the rest, and maybe even some to spare. And it seems the motivation for that would've been strong, since even if they didn't need the extra money, if they had more, they could splurge on a few extra unnecessary niceties, like maybe having a paid-for meal and not having to transport bread and lunch meat all the way from Odyssey -- or else have the remainder after the trip to bolster the club's apparently limited finances. I guess they're still young, though, and maybe the extra work didn't appeal to them, or these logistical details didn't cross their minds. The fundraising scenes worked, though, as a veteran of many youth trip fundraisers.
Rydell's mask is slipping off, a bit at a time. This episode leaves a few unanswered questions about his resources, though, which I hope we can find more about soon.