I'm not sure of the correct terminology here so I apologize if I've missed existing answers but when I searched I didn't find what I was looking for so I hope you can help.
Here is the situation. We have a product for sale based on the addition of the height and weight of the item multiplied by a factor — let's say 3 for now.
But when the item is larger, it costs more so I want when the combined width and height are over a certain amount to multiply more than 3 and when under a certain amount, to multiple at less than 3.
I tried a simple formula like this:
(h+w) x 3 x (h+w) / 60
(the 60 above is an average width + height)
Now this is too large a skew and I wonder if I can reduce this by 1/2 the skew or more? Any ideas on how to do what I want?