Need help converting this array to a matrix

A = importdata('sales.txt') 

A =

             1        1202        1533        1488        2144        1677
             2        1005        1268        1356        2200        1556
             3        1345        1650        1533        2535        1599
             4        1565        1853        1645        2750        1625
             5        1456        1675        1480        2695        1582
             6        1245        1375        1510        2455        1575
             7        1305        1638        1590        1103        1309
             8        2547        2124        2345        3411        2111
             9        1567        2008        1754        2875        1900
            10        1600        2375        1666        3550        1400
            11        2100        1590        1890        3100        1800
            12        2245        3375        4510        4455        3575

and after i do that i need to

Calculate the following:

• Total sales for each employee
• Total sales for each month
• Average sales for each month
• Which employees receive a bonus each month (Create a function to do this.)
• The total sales overall

also....

• Read the text file as given
• Preform above calculations using loops
• Have a user-defined function
• Write ALL of the input data to an Excel spreadsheet
• Write ALL of the results to an Excel spreadsheet
• Include no more than four Excel write statements

I am stuck at the beginning with the matrix so i cant get started on the rest of this project. and how do i refer to a line in the matrix so i can calculate that average and all that other stuff? any help at all would be great, thanks

[Star Strider]

See the documentation for Matrices and Arrays