Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The data are shown below:

Number of Pages (xx)	Cost(yy)
219	14.52
751	56.08
250	20
204	16.32
846	81.68
490	44.2
353	36.24
950	76
381	40.48
422	44.76
315	35.2

A student calculates a linear model using technology (Statistics Calculator or Computer) yy^ = xx + . (Please show your answers to two decimal places) Use the model to estimate the cost when number of pages is 724. Cost = $ (Use the linear model with yor rounded coefficients and then round your answer to 2 decimal places.)