Salary Structure not validating conditions correctly

[ben]

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Multiple conditions on Salary Structure with a single formula

HI i wanted to know how to put multiple conditions with a single formula on ERPNEXT version 12. Example: Component 1: if base is greater than or equal to 5,000 but less than or equal to 10,000 then base * 0.01 Component 2 if base is greater or equal to than 10,001 but less than or equal to 15,0000 then base * 0.02 How can i express these condition on the salary structure? Kindly assist.