------------------------------
|sale 1|number|cost|extension| 
------------------------------
|shirts|  3  |     |         |
------------------------------
|  ties|  2  |     |         |
------------------------------
| total|     |     |   69    |
------------------------------
------------------------------
|sale 2|number|cost|extension| 
------------------------------
|shirts|  2   |    |         |
------------------------------
|  ties|  4   |    |         |
------------------------------
| total|      |    |   66    |
------------------------------