jenny manages a factory which makes basketballs. Last month, it produced 400 basketballs which took a total of 300 direct labor hours. For this work, jenny paid out a total of $4800 to her direct labores. The standard direct labor hour rate is $15 and standard labour required is 1.25 direct-labour hours per basketball produced. Determine the total labour rate variance, the total labour efficiency variance, and the total flexible budget variance for the month.