Answer:
Brontë incorporates a touch of dramatic irony into this exchange because readers can guess that Mr. Rochester does not want Jane to be away from him for very long, even though Jane is unaware of his feelings.
Step-by-step explanation:
This exchange between Jane and Mr, Rochester shows his concern about her and how he cares about providing her in an indirect way from whatever she needs, it is intertwined between the lines the feelings of Mr. Rochester who uses the excuse of owing her money as a guarantee of her coming back in a short time.