Choose the purchases that belong in this settlement
Name the dates and the split before doing the arithmetic. For example, settle Monday through Sunday for shared groceries and supplies. Leave a personal lunch off the list. If an earlier week ended with a balance, show that separately so you can tell which payment closes which group of purchases.
Read the two rows aloud
Lee’s row says “Paid $26; share $20; should receive $6.” Max’s row says “Paid $14; share $20; owes $6.” Only one payment needs to move. After Max pays Lee, Lee’s final cost is $26 minus $6 and Max’s is $14 plus $6. Both end at $20.
Record the transfer without counting it as spending
Put the date range in the payment note and mark both entries settled. If a third purchase is still disputed, leave that entry open and handle it separately. The rest of the list can close without treating an unresolved item as agreed.
Keep the transfer with the date range and actual purchases. A $6 payment between the two people does not add another $6 of household supplies to the $40 total. If a refund appears later, link it back to this settlement and calculate the adjustment rather than deleting the two settled purchases.