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:
| Tie no | Home team | Score | Away team | Attendance |
| --- | --- | --- | --- | --- |
| 6 | ' Guiseley A.F.C. | 1–0 | Prescot Cables | 246 |
| 13 | Nantwich Town | 1–2 | Harrogate Town | 463 |
| 19 | Chasetown | 2–1 | Cambridge City | 444 |
| 21 | Nuneaton Borough | 2–0 | Bromsgrove Rovers | 607 |
| 30 | Alfreton Town | 1–2 | Hednesford Town | 246 |
| 32 | Market Drayton Town | 1–2 | Glapwell | 159 |
| 37 | Herne Bay | 0–3 | Hayes & Yeading United | 364 |
| 40 | Bedford Town | 2–3 | Boreham Wood | 310 |
| 42 | Hitchin Town | 5–0 | Haverhill Rovers | 160 |
| 43 | Camberley Town | 0–0 | Dartford | 242 |
| Dartford won 4–1 on penalties | Dartford won 4–1 on penalties | Dartford won 4–1 on penalties | Dartford won 4–1 on penalties | Dartford won 4–1 on penalties |
| 48 | Maldon Town | 0–2 | Tonbridge Angels | 151 |
| 53 | Stotfold | 2–1 | Chesham United | 165 |
| 56 | A.F.C. Hornchurch | 2–1 | Hendon | 333 |
| 57 | Woodford United | 0–2 | Sutton United | 137 |
| 60 | Windsor & Eton | 0–1 | Folkestone Invicta | 144 |
| 62 | Hillingdon Borough | 2–1 | Enfield Town | 140 |
| 64 | Bromley | 4–2 | Aylesbury United | 346 |
| 67 | A.F.C. Totton | 0–0 | Merthyr Tydfil | 273 |
| Merthyr Tydfil won 4–3 on penalties | Merthyr Tydfil won 4–3 on penalties | Merthyr Tydfil won 4–3 on penalties | Merthyr Tydfil won 4–3 on penalties | Merthyr Tydfil won 4–3 on penalties |
| 72 | Paulton Rovers | 2–0 | Dorchester Town | 232 |
Question:
How many people attended the game with a Tie no of 30?
Answer:
246.0