Adding different rate on extra hours

Please can you Impliment this logic:

let say up to 48 hours rate is 15usd then after 48hours rate is X1.5.
After 60hours rate is x2

Anything to help adding a different rate on top of the current rate and basic hours applied through a Tag or something I don't know.

At the moment the only way I found is to duplicate the task and put extra hours with different rate.

Hope you ll find a better way around this if possible.

Thanks

WorkingHours version: latest
OS + version: latest android
Device model: samsung note

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