Mutualism can take on many forms: Symbiosis: in which both organisms live together in closely proximity, and in which both generally derive benefit. The relationship is obligate, meaning at least one of the species must be involved in the relationship to survive.
Lowest Option Commission. Lightspeed Trading offers low commissions on options, allowing both occasional and frequent traders to take advantage of competitively-priced options. While the standard fee is an already low $0.60 per contract, active traders who trade more than 500 contracts per month will qualify for even lower rates. Those who trade in excess of 100,000 contracts per month will pay merely $0.20 per contract.
If you want to know why shops and galleries charge so much commission, then read this blog post. If your cost price is Â£15, your trade or wholesale price should be around Â£30, and the retail price will then be around Â£75 â Â£90. Be very aware that the consumer will always pay more or less the same price, but that the trade price can fluctuate.