Rate Sets/Rates by Job Code

Hello,

I have a question about rate sets/rates by job code. In both items you define the currency you want. Which takes precedence? If I am costing out labor hours and the currency defined at the Rates by Job Code is different than the currency defined at the rate set level (which converts the TLX into ACT), is there a way that the currency defined at the Rates by Job Code can take precedence?

Thank you