4. The currency used in a country is called Matimalik' (M) and is of base seven. A lady in that country bought 4 bags of rice at M56 per bag and 3 tins of milk at M4 per tin. What is the total cost of the items she bought? (a) M246m (b) M242, (c) M236, (d) M341; (e) M338 (1982:Q21)​