The following materials standards have The following materials standards have been established for a particular product: Standard quantity per unit of output 1.7 metres Standard price $19. 80 per metre The following data pertain to operations concerning the product for the last month: Actual materials purchased 5,800 metres Actual cost of materials purchased $113, 680 Actual materials used in production 5,100 metres Actual output 3,200 units What was the materials quantity variance for the month? Multiple Choice O $6,664 favourable. O $6,732 favourable. O $13,720 unfavourable. O $13,860 unfavourable