Part $1$: Given the Master Production Schedule and Product Structure for product DR$-$X below, compute for all figures in the blank cells $1-18($green$-$shaded$)$:

Week $-->5678910$

Gross Requirements $202020$

Part # Lead Time Qty On Hand Part # Lead Time Qty On Hand

DR$-$X $122$ C $10$

B$128$ D $10$

B$226$ E $310$

A$115$