Can you explain how to solve for the material price/quantity variances

Bandar Industries Berhad of Malaysia manufactures sporting equipment. 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 3,500 helmets, using 2,520 kilograms of plastic. The plastic cost the company $19,152. According to the standard cost card, each helmet should require 0.64 kilograms of plastic, at a cost of $8.00 per kilogram. Required 1. How much to the standards, this than the cost that was incurred? (Round Standard kilograms of what cost for plastic should have been incurred to make 3,500 helmets? greater or less is g plastic per helmet to 2 decimal places 3,500 Number of helmets Standard kilograms of plastic per 0.64 helmet 2,240 Total standard kilograms allowed Standard cost per kilogram 8.00 17,920 Total standard cost Actual cost incurred 19.152 17,920 Total standard cost Total material variance-unfavourable 1,232