The candy company is considering a new manufacturing process that costs $0.30 per unit for the first 400,000 units. For additional units, up to 725,000, the cost is $0.20 per unit. For all additional units over 725,000, the cost is $0.10 per unit. Which of the following ranges of total units contains the point where the cost of the new process is equal to the cost of the original process (where the cost is $0.21 for the first 500,000 units and $0.13 for all additional units)?

a. From 2,335,000 to 2,345,000
b. From 2,325,000 to 2,335,000
c. From 2,345,000 to 2,355,000
d. From 2,365,000 to 2,375,000