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 particular are available for the month of march, 2005.

180 kg of material P have been used @ Rs 680 per kg

220 kg of material Q have been used @ Rs 360 per kg.

The actual production of material PQ was 369kg.

Calculate the following variance

Material price variance

Material usage variance

Material mix variance

Material yield variance.