consider the bill material for product p and the data given in the table. The masters schedule requirements for P are 60 units in week 6. Item Q and R are manufactured by the firm and use the lot for lot lot sizing rule. Item S is purchased from a local distributor and has a fixed order quantity of 50 pieces per order.

P
Q(2)	S(3)
R(3)

Item	Lead Time	Quantity	Schedule receipts
P	1	5
Q	1	15	20 in week 2
R	2	0
S	2	25	15 in week 1

Given the information how many Rs should be ordered?

165

330

360

225

180