Can someone help me figure this one out?

You have learned that hardware ans software purchase costs represent only part of the total cost of ownership (TCO) technology ets and that there are additional cost components to consider. For this software system, ume that one-time installation costs $25 per user, one-time training costs $100 per user, annual technical support costs 30 percent of the initial purchase costs, and annual downtime costs another 15% of the purchase costs. What is the total cost of ownership of Bikes Unlimited's new desktop productivity systems over a three-year period?