A furniture company uses plywood sticker for tables. It provides the following data: Standard quantity of sticker per table 4 sq. ft Standard price per sq. ft of sticker Rs. 5 Actual production of tables 1000 Quantity actually used 4,300 sq.ft Actual purchase price per sq. ft Rs. 5.50. Calculate : (i) material price variance (ii) material usage variance (iii) material cost variance