The sales function for a new pen is given by S (p) =0.38p3 -0.2p2 +130p where p is the price dollars ($) per pen. Find a linearization of S at p -20 and use this linearization to estimate sales when the price is decreased to $19. Note that this question is not looking for the actual function value S(20). You are supposed to enter the estimate given by evaluating the linearization at the requested value. You should enter only the numerical answer, rounded correctly to two decimal places