She can carry only one item at a time.
MATT RUTLEDGE'S store carries only one item at a time.
That's cute but inefficient, forcing you to look at only one item at a time.
Clerks at EZ Pawn will show only one item at a time to a customer — no exceptions.
For example, those who take the Graduate Record Examination, which is often required for admission to graduate schools, receive one test question or item at a time.
The traditional Clipboard holds only one copied item at a time; it is erased when you copy something else or when the computer crashes.
"Kids tend to only eat one item at a time," says the food psychologist Brian Wansink, and they often don't like these foods to be touching.
When your budget is balanced, you have to ensure that it stays that way — and the author advises that you do so one item at a time.
Amazon.com, which sells millions of products, said Wednesday that it had agreed to buy Woot, a site that sells one item at a time.
Philip Murtaugh, chief executive of Coda, said in an interview Wednesday that the company was able to slice the price down to $40,795 by "hard work" and examining one line item at a time.
