Acompany that sells and installs custom designed home theatre systems claims to have sold 977 such systems last year. In order to assess whether these claimed sales are valid, an accountant numbers the company’s sales invoices from 1 to 977 and plans to select a random sample of 50 sales in-voices. The accountant will then contact the purchasers listed on the 50 sampled sales invoices and determine whether the sales amounts on the invoices are correct. Starting in the upper left- hand corner of Table 7.1( a) ( see page 260), determine which 50 of the 977 sales invoices should be included in the random sample.