I worked backroom back in the day and due to the nature of the work pants didn’t last too long back there, at least not in the condition that was acceptable for work. I bought my pants at Goodwill, although any thrift store would do. They had tons of khaki pants in good condition, most of them were of higher quality and better brands that I could have afforded at the mall and they were much, much cheaper. It’s worth a shot for affordable work clothes. Highly recommend.