How to set up PDBA to stop taking deductions once salary max is reached

E1 9.2 Update 7 through Feb 2023

Tools 9.2.7.3

We have a PDBA that calculates 4% of a salary in the first half of the year and 2% the second half of the year. Once the employee reaches a salary maximum (ex: $225K) the deduction should stop.

I was going to create one PDBA that calculates the wages, and a second PDBA that stores the rate with the Basis of Calculation being the first PDBA. This second PDBA multiplies the rate against the first PDBA. I want the second PDBA to stop calculating once the first PDBA hits $225K.

Asking for ideas on how to accomplish this. Thanks!