A restaurant offers pancakes for sale at $9 per meal. The cost of production per meal is $4. Any unsold pancakes at the end of the day are thrown away with a salvage value of $1 per meal. The daily demand for pancakes follows a normal distribution with an average of 200 meals and a standard deviation of 60 . Based on the newsvendor model, what is the optimal number of meals the restaurant should prepare daily? 187 219 243 260