When candidates make joint purchases say for a booth at the fair or food and beverages at an event they need to be careful to make and report the payments correctly.
Each candidate should pay an equal share of the expenditure and make the payment directly to the vendor. Direct payment avoids a situation in which one candidate appears to be using campaign funds to benefit another candidate, which is not permissible.
The expenditure will be entered into ORCA with the amount that you paid directly to the vendor. In the description, note that the expense is your portion of the booth or food/beverages for the event.