A electronics retailer list the sales (in thousands) of certain products in three cities for the prior quarter. During that period tablets sold for $241, laptops sold for $505, cell phones sold for $437, and DVR sold for $1,564.      City 1       City 2       City 3    Tablets       44 57 39 Laptop Computers 64 77 68 Cell Phones 31 53 69 Personal DVR 30 76 54 City 1's total sales :            City 2's total sales :                            City 3's total sales :

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