I think the DM should base her decision heavily on what the store manager thinks. You were caught off guard and it's understandable if you were nervous/not your best. IMO you should still have an excellent chance. Good luck!
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226