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:
| Home (1st leg) | Home (2nd leg) | 1st Leg | 2nd leg | Aggregate |
| --- | --- | --- | --- | --- |
| Guaraní | Platense | 0-0 | 0-1 | 0-1 |
| Huracán | Racing de Córdoba | 2-1 | 1-1 | 3-2 |
| Belgrano | Huracán La Heras | 2-1 | 1-3 | 3-4 |
| Central Norte | Círculo Deportivo | 0-0 | 2-3 | 2-3 |
| Altos Hornos Zapla | Argentino (F) | 2-0 | 1-2 | 3-2 |
| Juventud Alianza | Temperley | 4-3 | 1-4 | 5-7 |
| Cipolletti | Instituto | 0-0 | 1-3 | 1-3 |
Question:
When altos hornos zapla is the  home (1st leg) what is overall amount of 1st leg?
Answer:
1.0