Creating and using a Cost Formula Big Thumbs Company manufactures portable flash drives for computers. Big Thumbs incurs monthly depreciation costs of $15,500 on its plant equipment. Also, each drive requires materials and manufacturing overhead resources. On average, the company uses 17,750 ounces of materials to manufacture 7,100 flash drives per month. Each ounce of material costs $3.00. In addition, manufacturing overhead resources are driven by machine hours. On average, the company incurs $42,600 of variable manufacturing overhead resources to produce 7,100 flash drives per month In your calculations, round variable rate per flash drive to the nearest cent. If required, round final answers to the nearest cent. Required: 1. Create a formula for the monthly cost of flash drives for Big Thumbs. Total cost of flash drives - * Number of flash drives)