Check Your Understanding 6. Su Mei is looking at online classied ads. She nds a used cell phone for US$99 plus US$30 for shipping. The same cell phone costs C$199 new at a local store. a) What is the total cost of the used cell phone in Canadian dollars? b) Do you think Su Mei should buy the cell phone online? Why? 7. While in Manchester, England, Chelsea bought a sweater for 28. When she returned, she saw the same sweater for C$38. Which sweater cost more? By how much in Canadian dollars? 8. Sonya found a dress online for US$139. She found a similar dress in a store where she lives for C$230. Give Sonya advice on which dress to buy. Include pros and cons of shopping online versus shopping in her local store