Consider the following data for MRP. Develop the material requirements plan for item B and C and answer the questions below.

MPS start:

End item	Week 1	Week 2	Week 3	Week 4	Week 5	Week 6
A			120		80

Bill of materials:

• End item A is made of 1 unit of item B.
• Item B is made of 2 units of item C.

MRP-related information for each item:

Item	Leadtime (weeks)	Lot sizing	Safety stock	On-hand inventory	Scheduled receipts
B	1	L4L	0	30	60 in week 1
C	2	FOQ (50)	20	80	None

What is the gross requirement for item B in Week 3? units

What is the projected available balance of item B at the end of week 1? units

What is the gross requirement for item C in Week 4? units

What should be the planned order release for item C in week 2? units