The standard material cost to produce one ton of a chemical in Flamingo Chemicals is as follows

300 kg. of A @ Sh.100 per kg

500 kg. of B @ Sh.50 per kg

500 kg. of C @ Sh.60 per kg

During the period 100 ton of chemicals were produced from the usage of;

35 ton of A @ Sh.90,000 per ton

42 ton of B @ Sh.60,000 per ton

53 ton of C @ Sh.70,000 per ton

Required: Calculate material variances