Maize Water is considering introducing a water filtration device for its 20-ounce water bottles. Market research indicates that 1,000,000 units can be sold if the price is no more than $5. If Maize Water decides to produce the filters, it will need to invest $2,000,000 in new production equipment. Maize Water requires a minimum rate of return of 21% on all investments. Determine the target cost per unit for the filter. (Round answer to 2 decimal places, e.g. 10.50.)