Flowchart Bills  Selling TextbooksCalculate bill totals by following the instructions given in the form of a flow chart. 
This is level 1; Selling Textbooks You can earn a trophy if you get at least 7 correct.
You have started a new job preparing bills and the boss has sketched this flow chart to show how the totals are arrived at. Calculate the cost of the items on the right:
InstructionsTry your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help. When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file. 



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The more textbooks a customer buys the cheaper the unit price. The task at this level is to calculate the cost of buying different numbers of textbooks using the flow chart for guidance.
Similarly buying eggs in bulk is cheaper (per egg) than buying a smaller number of eggs. Traditionally eggs have been sold by the dozen. A dozen is 12.
Paying for gas and electricity usually includes a standing charge and a staged set of charges per unit. The amount of gas is measured in therms.
Try many different starting numbers in the given flowchart. Which starting numbers reach one the fastest? Why?