Happy Sponges Cleaning Services

I called to find out about an estimate and the lady who answered the phone didn't pay attention to the details of the space needed to be cleaned. She had to ask a second time and then told me that she charged $30 per 300 sq ft. I told her the website said $30 per 400 sq ft. She didn't understand why the website was different and told me she was too busy and if I had a calculator then I could figure out the estimate myself.