A large multinational company has introduced a new training scheme for their sales force, aimed at improving the number who hit their targets. Previous BCG analysis has found that for those who have received the new training, $80\%$ hit their targets each month, whereas only $60\%$ of those that haven't had the training hit their targets. Currently $70\%$ of the sales force have received the new training. What is the probability that a sales person chosen at random hits their sales target?