Please find the variances with verification

The standard cost of chemical mixture ~ PQ' is as follows: 40% of material P @ Rs. 400 per kg. 60% of material Q @ Rs. 600 per kg. A standard loss of 10% is normally anticipated in production. The following particulars are available for the month of March, 2005. 180 kgs of material P have been used @ Rs. 680 per kg. 220 kgs of material Q have been used @ Rs. 360 per kg. The actual of production of 'PQ' was 369 kgs. Calculate the following variance: a) Material Price Variance b) Material Usage Variance c) Material Mix Variance (1) Material Yield Variance