Final answer:
To create a custom function named Mileage in VBA, use the given code. This function multiplies the values of Miles and Rate.
Step-by-step explanation:
In VBA, a custom function can be created using the VBA Editor. To create a custom function named Mileage, you can follow the given code:
Function Mileage(Miles, Rate)
'Creates custom Mileage function
Mileage = Miles * Rate
End Function
This custom function takes two arguments, Miles and Rate. It multiplies these two values and returns the result.