I had worked in Non-profit company more than two years. I really don't think you shall dress formal each day. Even I worked in Financial department, we were with IT department on some floor in some building. Most of time I saw them just wear business causal. For woman, blazer, sweater are very good for normal working day. I like this kind of blazer made of 97%-100% cottons, which is really comfortable in office and a lots of colors available in the store, and you can wear it like a Pattern, one day light gray cotton blazer, one day light green sweater, other day light pink blazer, and so on.