Rate base

Hi,

I am working on a POC, lane from a->b.
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Distance rate service.

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Rate base : per day per mile.

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How do i achieve Per day per mile rate base.which rate basis is suitable?
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iISs their any Rate basis to achieve above? or i have to Add multi rule with Shipment total distance travelled Rate basis with per day rate basis?
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If this is the case What is Per day rate basis?