Up,Up & Away Is a Producer of Kites and Windsocks

Multiple Choice

Up,Up & Away is a producer of kites and windsocks.Relevant data concerning their production for the upcoming fiscal year are as follows:
$$\begin{array} { | c | c | c | c | c | } \hline \text { Product } & \begin{array} { c } \text { Demand } \\\text { (Units/yr) }\end{array} & \text { Batch Size } & \begin{array} { c } \text { Standard } \\\text { Setup time } \\\text { (hr/batch) }\end{array} & \begin{array} { c } \text { Standard } \\\text { Processing } \\\text { Time } \\\text { (hr/unit) }\end{array} \\\hline \text { Kites } & 20,000 & 25 & 2 & .25 \\\text { Windsocks } & 9,000 & 75 & 3 & .75 \\\hline\end{array}$$
Assume: 1 shift/day,8 hours/shift,5 days/week,and 50 weeks/year.
There currently are four machines,and management wants a capacity cushion of 20 percent.
Which of the following alternatives will enable Up,Up & Away to meet all of the upcoming year's demand using the minimum number of machines?

A) add six additional machines
B) add five additional machines
C) add four additional machines
D) add three additional machines