The Perfect Cheese Sandwich?

In my travels across the Internets, I have stumbled upon what may be the most important mathematical equation of my lifetime.  Researchers at Bristol University have developed the mathematical formula for creating the perfect cheese sandwich.  After countless empirical trials, the following formula was obtained:

W  [1 + ((bd)/6.5)) - s + ((m-2c)/2) + ((v+p)/7t)] (100 + l/100)

where:
W = the thickness of Cheddar in millimetres
B = The thickness of the bread
D = The dough flavour modifier
S = The thickness of margarine or butter
M = The thickness of mayonnaise
C = The creaminess modifier
V = The thickness of tomato
P = The depth of pickle
T = The tanginess modifier
I = The thickness of the lettuce layer

Now, if you don't have the patience to plug and chug, you can visit their cheddarometer online.

Personally, the cheddarometer doesn't apply to me.  For my cheese sandwiches, I only need two things: bread and an unsightly amount of cheese.  However, what about the mathematical formula for Italian hoagies, hot dogs, or cheese steaks?  Perhaps a possible honors thesis.....