The number of purchases made on a new online store is modeled by [tex]p(d)=15d+45[/tex], where d is the number of days since the store opened. The average amount spent in dollars per purchase is modeled by s(d)=0.15d^2-4d+80. Write a function R(d) to model the total daily revenue. Predict the total amount of revenue on the 23rd day.