Distinct counting with conditions

Here is an example of the data.

I can't use a filter, because I need different groups in the same table/figure, therefor I think I need measures for each "group" i wanna create.

For instance I wanna know how many sellers have sold fruit, have many sellers furniture and so forth.

Because a seller can sell apple more than once i need distinct count.

The "or" suggestion could only have two groups. "Banana" and "apple", but if we also add "Orange" it doesn't work I think.

Thank you all for your helpful tips.