After lunch, Will, Ben, and Jan go to an orchard to pick apples. The orchard manager offers to pay them to pick some apples for him. He will pay them $6 plus a certain amount for each apple picked. Their pay, P is represented by the equation P = bx + 6, where b is the amount paid per apple picked and x is the number of apples picked. If they picked 105 apples and got paid a total of $18.60, how much did they get paid for each apple picked?