表:项目. 收入. 类别. 项目 1. 200. A. 2. 250. B. 3. 300. A.
根据下面的表格,请写一个查询,以查找A类项目总收入.
The SQL query for finding the total revenue from items of category A would be:

```
SELECT SUM(Revenue) AS TotalRevenue 
FROM Table
WHERE Category = 'A';
```

Based on the provided input data, this query will return the result: 500 (which is the sum of the revenue of "Item 1" and "Item 3", both belonging to category A).