Answer
There are 1003 + 775 = 1778 stores in the US
Work Step by Step
There are 63 + 257 + 123 + 57 + 89 + 67 + 59 + 75 + 64 + 149 = 1003 stores listed in the table
There are 775 stores not listed
In total there are 1003 + 775 = 1778 stores in the US