Gemini Chemical Industries furnish the following information from their records : (i) For making 10 kg of output the standard material requirements are Material A 16 kg @ 36 per kg Material B 8 kg @ 4 per kg (ii) During April, 2011, 1,000 kgs of output were produced for which the actual consumptions of materials were Material A 1,500 kg @ 7 per kg Material B 1,000 kg @ 35 per kg Calculate : (a) Material Cost variance (b) Material Price Variance (c) Material Usage Variance