I'll give you a short break down. I don't want to make you have to write it for me :)
Here is the logic in plain english:
SMC A1:
Type = L, Price > $40,000 and DMD Qty > 500
SMC A2:
Type = L, Price is between $6000- $39,999 and DMD Qty is between 100-499
SMC A3:
Type = L, Price is...