Petra owns a coffee shop. she has ten employees. in 2007, she paid her employees minimum wage ($5.85 an hour).in 2008, the minimum wage increased to $6.55 an hour. in 2009, the minimum wage increased to $7.25 an hour. petra is paying her ten employees for 40 hours a week, 52 weeks each year. in 2007, petra spent on wages for her employees each week. when the minimum wage rose in 2009, petra had to increase her annual budget for wages from 2008 by .