In a UMTS network, a Node B serves three sectors$,$ each with a maximum power output of $20$ W$.$ The Node B is handling $40$ simultaneous voice calls, each consuming $0\mathrm{.}125$ W of power, in Sector $1.$ Simultaneously, Sector $1$ is also managing a data session requiring a transmission power of $5$ W$.$ Calculate the remaining available power for new users in Sector $1.$ If a new user requires a data connection with a power allocation of $2$ W$,$ how many additional users can Sector $1$ accommodate without exceeding the power limit$?$