Helm Lardar:"Secondly, you seem to have some strange goals to get a non-member." Anyone who's confused with Shree Sairam's aims: the RS gold stats desired are almost Salmoneus' stats. That is why at first glance they seem so perplexing. To Shree Sairam: If you want to get money in Runescape, what you want to comprehend how to earn money with skills (fishing, mining, woodcutting) and to understand that there are money-losing skills (cooking, smithing).
You said you wish to create and sell mithril sets (6,223 gp) to buy a Santa Hat (100.6 million). A mithril set requires 13 mithril bars. Or if you prefer, 13 mithril ores and 52 coal. 13 mithril bars * 1680 gp per mithril pub = 21,840 gp 6,223 gp. (13 mithril ores * 375 gp per mithril ore) + (52 coal * 281 gp per coal) = 4,875 gp + 14,612 gp = 19,487 gp 6,223 gp. Selling mithril bars, mithril ores, or coal are better money-making than selling mithril full collections.
Stronger money-making in the Grand Exchange stems in purchasing raw material (raw fish, ore, coal, bars) because lots of people wish to buy raw material to quickly level up their skills (they know they will lose money but gain quickly skills XP). Any completed products (cooked fish, mithril sets) will typically be sold for less gp on the Grand Exchange than raw materials, you should keep that in mind. It is possible to market 100.6 million gp of mithril bars to buy a Santa Hat, but by selling mithril full places to the Grand Exchange to buy a Santa Hat, you would have had 353.1 million gp of mithril bars to make 100.6 million gp of mithril total collections (a gigantic money-losing proposition).
Whilst smithing can make you money should you use it to smelt metal bars, smithing loses you money should you apply the skill for hammer and anvil metallic processing. It's not by essentially having level 74 smithing (such as Salmoneus) that you are able to get a Santa Hat. Don't bother with that because cooking loses money the way (hammer and anvil) smithing loses cash. Raw food generally sells for more cash on the Grand Exchange than cooked food. Individuals who do not need to fish but that wish to quickly raise their cooking level will knowingly get rid of money buy purchasing raw fish, cooking the fish to get fast cooking XP, and selling the cooked (not as gp) fish back into the Grand Exchange.
A fantastic thing to do is to fish, sell raws to the Grand Exchange. Keep you cooking level at 4. And if you need food to train your battle , fish, sell the uncooked fish to the Grand Exchange and purchase fish. You've got the cooked fish to eat and in the exact same time wind up with more money if you do it that way. Again, if you want a Santa Hat, a much better idea is to keep your cooking level at 4, and promote raws. Cooking just loses money. Another man who published suggested runecrafting for great money. But do not bother with this, runecrafting is a cheap RuneScape gold completely useless ability. There are better ways to make money than runecrafting.