I am just need the breakout of #3 & #4 - I cannot understand how to get the correct answers

Bandar Industrles Berhad of Malaysla manufactures sporting equipment. One of the company's products, a football helmet for the North American market, requires a speclal plastic. Durlng the quarter ending June 30 , the company manufactured 3,800 helmets, using 2,736 kllograms of plastic. The plastic cost the company $20,794. According to the standard cost card, each helmet should require 0.64 kllograms of plastlc, at a cost of $8.00 per kilogram. Required: 1. What is the standard quantlity of kllograms of plastic (SQ) that Is allowed to make 3,800 helmets? 2. What is the standard materlals cost allowed (SQ SP) to make 3,800 helmets? 3. What is the materlals spending varlance? 4. What is the materlals price varlance and the materlals quantlty varlance? (For requlrements 3 and 4 , Indlcate the effect of each varlance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (l.e., zero varlance). Input all amounts as positlve values. Do not round Intermedlate calculations.)