Cathy Company operated at 100% of capacity last year, and had the following cost formula for total manufacturing costs: Y $100,000+ $100X Assuming no change in cost structure, what would Cathy's cost formula have been last year if they only operated at 90% of production capacity? OY $90,000+ $100X OY $100,000+ $90X OY $100,000+ $100X OY $90,000+ $90X