I'll give you an analogy that describes our BSFC dilemma...
Say you need tomatoes, so you go to your grocery store and they have a 2lb package for $6 and a 5lb package for $10.
-2lbs of tomatoes are enough for your dinner
-You could only hope to eat 3lbs of tomatoes before the rest spoil.
What do you do?
The 5lb package is a better deal right? Well if you bought the 5lb package, and you could only eat 3lbs before the other 2lbs spoil, you've effectively paid $3.33/lb for your tomatoes.
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