A newspaper vendor is trying to determine how many daily papers to order. The cost to the vendor of a single paper is $0.75. The vendor sells each paper for $1.85. The value of the paper will drop to 0 the next day. If the daily demand for papers is normally distributed with a mean of 500 papers and a standard deviation of 100 papers. The newspaper vendor should order how many papers?
a. 500
b. 525
c. 559
d. 795
e. 475