Hi @jennifer zen ,

```
calculate ( sum (sales[TotalAmount],Product)
```

This means to get the sum of total amount for all the product.

```
calculate ( sum (sales[TotalAmount],Product[color])
```

This means to get the sum of total amount for all the product color existed in product table.

```
calculate ( sum (sales[TotalAmount],Product[name])--same result as above
```

This means to get the sum of total amount for all the product Name existed in product table.

So basically, they are equal, as we did not filter out any products in product table.

Regards，

Zoe

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