Well to start you off,
1. (@Delivery_Quote - @Fully_Loaded / 60)
2. (@Actual_Zone_DT / TotalNumberOfLifts + 10)
3. I don't know what you mean by "all of the above." How should we combine 1 and 2? Add? Multiply? It would be either:
((@Delivery_Quote - @Fully_Loaded / 60) + (@Actual_Zone_DT / TotalNumberOfLifts + 10)) / @Delivery_Quote
or
((@Delivery_Quote - @Fully_Loaded / 60) * (@Actual_Zone_DT / TotalNumberOfLifts + 10)) / @Delivery_Quote