RS Quit Now's Flipping Log

Well I'm fairly new to flipping and this is my first comitted flipping log so please give me as much advice as you want, I welcome all of it 

Sell-Buy=Profit
(Buy÷Profit)100=Profit Margin

December 26th, 2013
Bandos Helmet


6,100,000-6,000,000=100,000 profit
(100,000÷6,000,000)100=1.66% profit margin

Bandos Chestplate


5,975,000-5,875,000=100,000 profit
(100,000÷5,875,000)100=1.7% profit margin

Bandos Tassets


4,075,000-3,875,000=200,000 profit
(200,000÷3,875,000)100=5.16% profit margin

Off-Hand Drygore Mace


40,900,000-40,400,000=500,000 profit
(500,000÷40,400,000)100=1.24% profit margin

Off-Hand Drygore Longsword


60,900,000-60,254,653=645,347 profit
(645,347÷60,254,653)100=1.07% profit margin

Total Profit
1545347