A salesperson at a local bank has a starting salary of $55,000. For each mortgage this sales person closes, they receive a $2,100 bonus. In order to be promoted, the sales person needs to eam at least $70,000 between their starting salary and mortgage bonus. What is the minimum number of mortgages a sales person needs to close in order to be eligible for promotion? A) 7 B) 8 C) 10 D) 27​