What page is the following from in the book So B. It by Sarah Weeks: “Mamas brain is like a machine with some of the parts missing. the trouble is, nobody knows which ones”?

From the text:

Bernie once explained it to me by comparing Mama to a broken machine.

“All the basic parts are there, Heidi, and from the outside she looks like she should work just fine, but inside there are lots of mysterious little pieces busted or bent or missing altogether, and without them her machine doesn’t run quite right.”