please solve asap

Question No 4. The standard mix to produce one unit of product is as follows: Material A60 units @ \$15 per unit Material B80 units @ \$20 per unit Material C100 units@\$25 per unit During the month of July , 10 units were actually produced and consumption was as follows: Material A640 units @ \$17.50 per unit Material B 950 units@\$18.00 per unit Material C 870 units @ \$27.50 per unit Calculate material variances ( 20 marks)