Katherine is in the business of manufacturing phones. She must pay a daily fixed cost to rent the building and equipment, and also pays a cost per phone produced for materials and labor. The labor and materials cost $100 for each phone manufactured, and the total cost of producing 9 phones in a day would be $1400. Write an equation for C
,
C, in terms of
p
,
p, representing total cost, in dollars, of producing
p
p phones in a given day.