Not to mention, Frankie dealing with the situation by telling Brick to "take them to Grandpa Mike's". WTF?? They were brand new chairs! Why not return them for the actual money spent??
Don't forget, in one of the final episodes, Frankie outright admits that she's on Facebook literally all day at work...like WTF?? It seems like she's the only other employee at that dentist's office, so she would be pretty steadily busy, serving as hygienist and probably doing billing, etc. When would she even have time for that?