A,B, & C are correct, but it says my answer for D is wrong. Can someone help me with part D?

Radovilsky Manufacturing Company, in Hayward, California, makes flashing lights for toys. The company operates its production facility 300 days per year. It has orders for about 11 comma 900 flashing lights per year and has the capability of producing 95 per day. Setting up the light production costs $49. The cost of each light is $0.95. The holding cost is $0.10 per light per year.

a) What is the optimal size of the production run? 4474 units (round your response to the nearest whole number).

b) What is the average holding cost per year? $ 130.31 (round your response to two decimal places).

c) What is the average setup cost per year? $ 130.33 (round your response to two decimal places).

d) What is the total cost per year, including the cost of the lights? $ 12160.64 (round your response to two decimal places).