 The author further writes that Walmart's whole business model is based on reducing the carrying costs of unsold merchandise, and any speed bump along the line adds back costs.Front-end managers are supposed to open another register any time there are more than three customers in line, but these employees have to come from some other part of the store, and the night crew may or may not be able to catch up.In September 2013, "Bloomberg Businessweek" reported that Walmart will be offering 35,000 part-time employees full-time jobs and will be offering another 35,000 temporary employees permanent part-time positions.