Amber opened a cell phone repair company in 2000. From 2000 to 2020, the function N(t) that models the annual number of cell phone repairs (in thousands) and the function C(t) that models the average cost of a repair (in dollars) are as shown in the photo, where tis the number of years since 2000. Find a function R(t) that models Amber’s total annual revenue from cell phone repairs. Then use the function to estimate Amber’s total revenue in 2015.