help part b please

Radovilsky Manufacturing Company, in Hayward, California, makes flashing lights for toys. The company operates its production facility 300 days per year, it has onders for about 12,200 fashing lights per year and has the capability of producing 105 per day. Setting up the light production costs $48. The cost of each light is $1.05. The holifing cost. is $0.15 per light per year. a) What is the optimal size of the production run? units (round your response to the nearest whole number). b) What is the average holding cost per year? (round your response to two decimal places)