Can I replace olive oil with melted butter for betty crocker cookie mix?

I didnt look at the recipe, and I thought it would be butter like all other recipes, but it turned out it was olive oil, would using butter be ok? or should I just wait till I can buy some olive oil?
Update: I think its a new cookie mix type, double chocolate. Ive never heard of using olive oil for betty crocker cookie mix either. And thanks for all the answer everybody :) I made them and they turned out delicious, a bit crunchy though, but what can ya do.
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