If you insist on insulting my knowledge of basic economics, I will remind you that I fully understand these concepts and apply them to Ladder Slasher on a regular basis.
Buy low!Friday, December 14, 2007 8:31:20 PM Store 1.11 (2,448.00 -> 2,446.89) to Forum Bank (by Forum Bank) LS Item Purchase 488076
Sell high!Saturday, December 15, 2007 5:40:50 PM Store 8,000.00 (2,566.75 -> 10,566.75) from Forum Bank (by Forum Bank) LS Item Sale 488076
Buy low!Saturday, December 15, 2007 7:25:59 PM Store 200.00 (10,563.10 -> 10,363.10) to Forum Bank (by Forum Bank) LS Item Purchase 431885
Sell high!Saturday, December 15, 2007 8:02:54 PM Store 7,000.00 (10,021.70 -> 17,021.70) from Forum Bank (by Forum Bank) LS Item Sale 431885
Buy low!Monday, December 17, 2007 12:20:54 AM Store 10.00 (15,891.50 -> 15,881.50) to Forum Bank (by Forum Bank) LS Item Purchase 1114474
Sell high!Sunday, April 06, 2008 7:19:01 PM Store 1,200.00 (12,400.70 -> 13,600.70) from Forum Bank (by Forum Bank) LS Item Sale 1114474
Buy low!Thursday, March 13, 2008 7:05:26 PM Store 6,200.00 (20,056.80 -> 13,856.80) to Forum Bank (by Forum Bank) LS Item Purchase 2069571
Sell high!Wednesday, April 23, 2008 9:30:15 PM Store 12,000.00 (13,811.80 -> 25,811.80) from Forum Bank (by Forum Bank) LS Item Sale 2069571
Buy low!Wednesday, February 20, 2008 12:11:01 PM Store 1,350.00 (18,798.30 -> 17,448.30) to Forum Bank (by Forum Bank) LS Item Purchase 12204
Sell high!Sunday, February 24, 2008 4:14:01 PM Store 3,500.00 (18,359.40 -> 21,859.40) from Forum Bank (by Forum Bank) LS Item Sale 12204
Buy low!Thursday, December 20, 2007 5:27:18 PM Store 50.00 (16,352.00 -> 16,302.00) to Forum Bank (by Forum Bank) LS Item Purchase 1126387
Sell high!Wednesday, April 30, 2008 1:49:17 AM Store 700.00 (3,831.00 -> 4,531.00) from Forum Bank (by Forum Bank) LS Item Sale 1126387
Enjoy your slashing and have a nice day

Just because your customers and suppliers are dumbasses doesn't make you good at economics. And your purchase history is pretty well known, the opportunity cost of posting it was hardly worthwhile.