What sorts of jobs does R begin to complete on the narrator's behalf in Chapter 12 and why?

At one point in Chapter 12, R asks the narrator if she has any work that he can do while he passes the time in his small room between the first and second floors of the narrator's home. She understands his need immediately, and though she finds it rather time-consuming to figure out jobs that he can perform inside his little room, she embarks on plans that soon fill his time quite satisfactorily. The narrator tells the reader that they are all "simple jobs," such as "organizing receipts, sharpening pencils, recopying [her] address book, putting page numbers on [her] manuscripts" (93) and other similar tasks.