IF, AND, OR Help

[tenglish01]

Travel Template.xlsxSo this post is actually based on a previous post of mine... But now the issue has been complicated further.

Here's what I need:
AT costs $2.50/mile and has a $25 fee for loading wheelchairs (WC) or scooters (SCOOTER)
CD costs $5.00/mile and has a $75 fee for loading wheelchairs or scooters
There is no additional loading cost if the vechicle is SEDAN
VA will cost the same as CD
If column L says "RT" (Round Trip), I need to double the mileage I enter in column N
If column L says "OW" (One Way), the mileage in column N remains the same -- whatever value is entered.
There is a possibility that Columns A and C will be different carriers (either both CD, both AT, or a combination)

Can anyone help me with this? Here is the previous formula I was using:
=IF(AND(L7="RT",OR(M7={"WC","SCOOTER"})),150+5*N7,IF(AND(L7="OW",OR(M7={"WC","SCOOTER"})),75+5*N7,2.5*N7))

This does not take into account that AT and CD cost different amounts for mileage.

I attached the spreadsheet if that helps... THANK YOU!!!!