This is somrthing new to our business. I need help writing a bid for cleaning mens and women's restrooms in a chain of retail stores. How much should I charge? How do I charge for consumables? What is the going rate for a trip charge/ fuel charge for travel?

It really does depend on the going rates where you will be doing the cleaning. A store that supplies only janitorial supplies for around where you will be doing the cleaning may be your best bet as far as getting an idea for a price. Also, many places where you clean may already have the equipment and supplies on hand for you to use.