Two Smoothie King stores in Charlotte, N.C., have been closed until further notice after racial slurs were allegedly added to customers’ receipts. The incidents reportedly took place at two different Smoothie King stores within hours of each other on Sunday. The first incident allegedly happened around 2:30 pm, according to a photo of the receipt that was shared on social media. In the photo, the N-word is written as the customer name. “I thought it was very disrespectful," Calvin Caldwell, the customer who received the receipt with the racial slur told WSOC-TV. "I thought it was very rude, especially since...