April 15th: Jasmine pays her friend $90 from $150 tutoring fees to cover tutoring sessions, reducing her revenue and increasing expenses, impacting cash flow.

- from this statement how would we put it into the ledgers, because if we increase revenue, & then decrease the 90 as a cost, dont they both need their own dual effects, so we would need to either add or decrease the 90 and the 150 from another accounting element.??