Opening a store while one of the owners is sitting shiva; a matter of loss

Two partners own a store, and one of them is sitting shiva. Is it permissible for the second partner to open the store in a case where they have losses because they do not open the store, such as payment to workers who do not come to work, and also the rent that they pay for the store and the like?

One should not open a store publicly even when there is a matter of loss; the custom is to be lenient to open from the fourth day onwards.

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