What is a 'long arm back rack' designed to do?

The 'long arm back rack' is designed primarily to support the efficient bagging of multiple bags at once, which is why it is associated with the option that pertains to allowing bagging two bags simultaneously. This design feature enables cashiers to more efficiently manage the checkout process by providing additional space and support for bags, thus streamlining the workflow during busy periods.

This capability is crucial in a retail environment, as it minimizes delays in the checkout line and enhances the overall customer experience. By allowing cashiers to handle multiple bags without needing to reorganize or pause for individual items, the 'long arm back rack' plays a vital role in maintaining a smooth and quick checkout process. Moreover, the element of capacity in bagging relates directly to the operational goals of efficiency and speed in customer service settings.