The standard number of hours that should have been worked for the output attained is $6,000$ direct labor hours and the actual number of direct labor hours worked was $6,300.$ If the direct labor price variance was $$3,150$ unfavorable and the standard rate of pay was $$9$ per direct labor hour, what was the actual rate of pay for direct labor?

A$)$ $$7\mathrm{.}50$ per direct labor hour

B$)$ $$8\mathrm{.}50$ per direct labor hour

C$)$ $$9\mathrm{.}00$ per direct labor hour

D$)$ $$9\mathrm{.}50$ per direct labor hour