Video of CA. Parag Gupta explaining concepts relating to Material price & usage variance in layman terms. 
CA. Parag Gupta is one of the best faculty of Advance Management Accounting (i.e. Costing & O.R.) across India. 
Remember, Decision of Quantity used/purchased in Material Price Variance is decided on the basis of Single/Partial Plan followed. While explaining concept in this video, It is assumed that single plan is being followed. 
Website: www.paraggupta.com