Peoplesoft EX9.2 : Per Diem expense type

Hello,

In our per diem expense type setup, we need it to default the amount based on expense location, and then the users should be able to select individual deductions for lunch, breakfast and dinner, as shown below. To allow this I had to create these additional expense types for lunch, breakfast and dinner and activate these as well. Now, the users are able to see these extra expense types in addition to the per diem expense types and this is creating confusion. Is there a way to resolve this in a way, that these expense types will be available only