plz help answer the question by choosing from the multiple choice given at the bottom thank you!

Precious Process Proprietorship manufactures refrigerators in one department. All material costs are added at the beginning of the manufacturing process, like our Practice Set (Thakin). Based on the following data, what is the total number of physical Units to be Accounted for? \begin{tabular}{|l|l|} \hline Production Data Month of June & Refrigerators \\ \hline work in process units, June 1st & Zero Units \\ \hline units started into Productioinjme 20,000 Units \\ \hline work in process units, June 30th & 4,000 Un its \\ \hline work in process June 3oth, persent & 75% \\ \hline complete (conversion costs) & 70 \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline Cost Data-June & Dollars \\ \hline work in process, June 1st & $ Zero \\ \hline Material cost Added Doring Month & 840,000 \\ \hline Labor cost Added During Month & 245,000 \\ \hline Duerhead Cost Added During & $1,505,000 \\ \hline Month Total & \\ \hline \end{tabular} 24,000 units 13,500 units 20,000 units 16,000 units