Salary.com (the name of the web site says it all) surveyed more than 40,000 mothers and reported this week that stay-at-home moms work an average of 91.8 hours a week doing 10 jobs that resemble those of housekeepers and day care center teachers, as well as psychologists and chief executive officers.

Accounting for the hours worked in each category, the Waltham, MA, firm calculated that these mothers--who care for 28 percent of the nation's children under 15--would earn a base annual salary of $46,931 for a 40-hour workweek (the national median is $40,988). Adding nearly 52 hours of overtime, paid at time and a half, they easily passed the six-figure mark.

At-home dads surveyed by Salary.com said they work 81 hours a week, more than 10 hours less than at-home moms. That may be because working moms take over when they come home so that dad can take a break. After a full work day, she does errands, cooks dinner, does dishes, nurses sick children, and on and on--you get the idea.

As we said during the Women's Lib days, Every Mother is a Working Woman (and then some!)