How can I add additional Pay Types for each employee, need about 25 for each? Union employees with multiple types of codes (Night OT, Night DT, Evening OT, Evening DT)

I have been asking if I can get more pay type fields to add hourly rates in to. Need about 25 for each employee. Currently I utilize all the standard lines such as Overtime, sick, bereavement, and jury duty. In the other pay types I have union employees so they have multiple types of codes for example, Night OT, Night DT, Evening OT, Evening DT…. That is just to name a few and give you a general idea.