A mixture of sand, cement and ballast is in the ratio of 5:1:3.If the cost of 7 tonnes of sand is sh.3000,5 tonnes of cement sh.50000 and 8 tonnes of ballast sh 4000.Find the cost of 7 tonnes of the mixture...plz show the working​

The unpaid balance on a mastercard charge was $1,056.23. during the month, payments of $300 and $250 were made and charges of $425 and $274.16 were added. if the finance charge is 1.2% per month on the unpaid balance, find the new balance at the end of the month. $1,205.39 $1,218.06 $918.06 $1,768.06