Question 5 (20 marks) Part 1 (12 marks) Mattress World is a retailing business that sells mattresses. The expected sales volume (i.e. units of product to be sold) for the first four months in 2020 are as follows: Month Sales (unit) January 100 February 140 March 130 April 120 The following additional information is available: Budgeted purchase price for mattresses is $100. 30 units were in the inventory at the end of December 2019. Mattress world maintain an ending inventory balance of 30% of the next month's expected sales. Required Prepare the Inventory and Purchase Budget for the first three months in 2020. (12 marks)