The last panel, I don't know if I can sufficiently translate; from what I can tell, it's a play on boke/tsukkomi stuff, but I don't think I can put them into terms that succinctly communicate the dimensions of meaning. If someone wants to take a crack at a fresh and more true translation, go right ahead! I'm always eager to learn.

Additionally, that big bottom-right Sachiko bubble, I'm very shaky on. Requesting a correction.