there shop keepers go to a wholesaler to buy packets of mints. each shop small packets, medium packets and large packets of mints. Anne buys 600 packets of mints. 34% are small packets and 49% are large packets. Ben buys 400 packets of mints, 3/10 are small packets and 1/10 are large packets. Chas buys 210 small packets of mints so that number of small packets: number of medium packets = 3 : 4 work out the total number of medium packets of mints these shop keepers buy.​