schematic/costs

   1 2pin parts are resistors and capacitors, assumed
   2 total cost of .2 to solder and .05 cents each.
   3
   4              part    solder  total
   5 ACCEL:
   6 sca3000-D01  20.25   1.8     22.05
   7 2pin (2)       .1     .4       .5
   8 total        20.35   2.2     22.55
   9
  10 MAG:
  11 ad7799       5.94    1.6     7.54
  12 hmc1052      5       1       6
  13 hmc1051z     5.2     1.2     6.4
  14 irf7509      1.45     .8     2.25
  15 2pin (6)      .3     1.2     1.5
  16 total       17.89    5.8    23.69
  17
  18 USB
  19 connector    .45     .6      1.05
  20 xtal         .49     .3       .79
  21 2pin         .15     .6       .75
  22 total       1.09    1.5      2.59
  23
  24 MICRO (pick one)
  25 atmega644    4.6     4.4    9
  26 atmega128    8.75    6.4    15.15
  27 at90USB1287 11.03    6.4    17.43
  28
  29 BOX
  30 lcd          2      1.8      3.8
  31 lcddiode     .1     .2       .3
  32 laser        7.85    .3      8.15
  33 battery      2       .3      2.3
  34 charger       .85    .5      1.35
  35 regulator     .85    .5      1.35
  36 2pin(3)       .15    .6       .75
  37 total       13.96   4.2     18