Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Opponent | Location | Result | Attendance |
| --- | --- | --- | --- | --- |
| 09/09/1978* | Virginia | Groves Stadium • Winston-Salem, NC | W 14-0 | 21500.0 |
| 09/16/1978 | Virginia Tech | Groves Stadium • Winston-Salem, NC | L 6-28 | 22750.0 |
| 09/23/1978 | at #10 LSU | Tiger Stadium • Baton Rouge, LA | L 11-13 | 77197.0 |
| 09/30/1978* | North Carolina State | Groves Stadium • Winston-Salem, NC | L 10-34 | 29700.0 |
| 10/07/1978 | at Purdue | Ross-Ade Stadium • West Lafayette, IN | L 7-14 | 54362.0 |
| 10/14/1978* | North Carolina | Groves Stadium • Winston-Salem, NC | L 29-34 | 31500.0 |
| 10/21/1978* | at #6 Maryland | Byrd Stadium • College Park, MD | L 0-39 | 43119.0 |
| 10/28/1978 | at Auburn | Jordan-Hare Stadium • Auburn, AL | L 7-21 | 52210.0 |
| 11/04/1978* | #16 Clemson | Groves Stadium • Winston-Salem, NC | L 6-51 | 30400.0 |
| 11/11/1978* | at Duke | Wallace Wade Stadium • Durham, NC | L 0-3 | 19825.0 |
| 11/18/1978 | at South Carolina | Williams-Brice Stadium • Columbia, SC | L 14-37 | 42762.0 |
Question:
What was the highest attendance when the result was L 6-28?
Answer:
22750.0