> Watch any fantasy draft or craft and see how much math is going on.

Indeed. Check out my irb history from playing Hero Academy (there's way more above):

  >> 200*2.55+200*0.8
  => 670.0
  >> 200*2.55+200*0.8*2
  => 830.0
  >> 300*2.55
  => 765.0
  >> 300*2.55+399*0.8
  => 1084.2
  >> 300*2.55+300*0.8
  => 1005.0
  >> 0+300*2.55+300*0.8
  => 1005.0
  >> 260*2.55+260*0.8
  => 871.0
  >> 260*2.55+260*0.8*2
  => 1079.0
  >> 260*2.55*1.5+260*0.8*2
  => 1410.5
  >> 260*2.55*1.5
  => 994.5
  >> 260*2.5+260*0.75*2
  => 1040.0
  >> 130+180+230+280
  => 820
  >> 820*0.8
  => 656.0
  >> 1350*0.8
  => 1080.0