S Corp Cleaning Business Startup Cost Deductions - Cleaning Supplies

I am confident that the startup costs I incurred are deductible except for the cleaning supplies I purchased (not including equipment).  The information on the IRS website is fairly vague in the rules for deducting cleaning supplies or anything similar as startup costs. It would make sense to me that cleaning supplies would qualify for a startup cost deduction as how can I open a cleaning company without cleaning supplies.......but maybe I'm missing something.  Thank you for your help!