There isn't an foolproof way to split a sale 3-ways. Two options are:
*) Note that each item on a sale can be split by two sets of initials.
You can change the split on each line item by Choosing the
More Options button and then choose COMMISSION from the drop-down
menu (or press the short-cut which is Ctrl-PgDn) This way you can many
clerks if there are many pieces.
*) if it's really a 3-way split on a single line you could be a bit
creative. you could have initials, BOB, JOE, SUE and you could
have initials B&J, B&S, J&S to represent a combination - so..
using the initials BOB and J&S would mean Bob and Joe and Sue
- yes it's a bit awkward..
In a later version we'll likely increase to 5 sets of initials per sale.