A multi-level marketing scheme starts with 7 members, and each of these members have to recruit 6 more members in their downlineto move up a level and earn a greater commission, and then those they recruit must recruit 6 more members, and so on, so to be successful, the scheme has to grow by a factor of 6 each level . The scheme has 10 levels . How many total people need to be involved in the entire scheme for the original members to make it to the top level ?