One of the company's products, a football helmet for the North American

market, requires a special plastic. During the quarter ending June 30, the company manufactured 35,000 helmets, using 22,500 kilograms of plastic. The plastic cost the company $171,000.
According to the standard cost card, each helmet should require 0.6 kilograms of plastic, at a cost of $8 per kilogram.

-What is the standard quantity of kilograms of plastic (SQ) that is allowed to make 35,000 helmets? 
-What is the standard materials cost allowed (SQ × SP) to make 35,000 helmets?
-What is the materials spending variance?
-What is the materials price variance and the materials quantity variance?