NEW YORK (MainStreet) — Perhaps we should start the movement now: make Cyber Monday a national holiday. And why not? Most working Americans -- a whopping 86% -- plan to spend some time shopping online while they work on Cyber Monday.

Productivity could reach an all-time low as fully 25% of employees say they plan to spend four hours or more shopping while they work on the biggest day for online sales.

Could somebody answer the phones, we're shopping here!

RetailMeNot and The Omnibus Company polled cyber shoppers who readily admitted their jobs will not stand in the way of bagging a big bargain come Monday. More than two thirds (67%) of those surveyed say they plan to shop for an hour or more while "working." Considering the fact that the United States Bureau of Labor and Statistics says there are 155 million Americans in the workforce, earning an average hourly wage of $24, the study says employers may see more than $2.5 billion -- per hour -- in lost productivity.

More than one in five (21%) of respondents said they've been caught shopping online at work. But it doesn't seem to be slowing them down.

According to the survey, nearly one in four (24%) holiday shoppers plan to do more online browsing for gifts this year than they did last year.

And it's not only the company workstation being hijacked for holiday shopping at work. Nearly half (46%) say they'll use a mobile device to do their shopping. Employers might want to get workers to check their smartphones at the door.

According to the survey, the top categories typically purchased on Cyber Monday are electronics (62%), entertainment (59%) and apparel (51%). But males are more likely than females (70% vs. 55%) to purchase electronics. And 60% of females are likely to purchase apparel versus 41% of males. Almost half of females (48%) are likely to purchase toys versus only 28% of males.

--Written by Hal M. Bundrick