1. Calculate the inventory position (IP) based on data given below; On-hand inventory (OH) position is 20 items, scheduled receipt (SR) is 170 and backorder (BO) position is 50.

2. Time between orders (TBO), defined as the length of time between the receipt of two successive orders. Calculate TBO based on the following information: Average demand during lead time for an item is 20 items per week and lead time is 3 weeks. Q is given as 3000.