2g       @0.5     0.5 x 250 = $125

3g       @1        1 x 1000 = $1000

5g       @1.5     1.5 x 500 = $750

10g     @3        3 x 200 = $600

20g     @7        7 x 100 = $700

50g     @10      10 x 100 = $1000

100g   @20      20 x 50 = $1000

500g   @60