Ivanhoe Ltd. estimates sales for the second quarter of 2022 will be as follows. Month Units April 2,190 May 2,290 June 2,060 The target ending inventory of finished products is as follows. March 31 1,720 April 30 1,900 May 31 1,880) June 30 2,000 Two units of materials are required for each unit of finished product. Production for July is estimated at 2,310 units to start building inventory for the fall sales period. Ivanhoe's policy is to have an inventory of raw materials at the end of each month equal to 50% of the following month's production requirements. Raw materials are expected to cost $4 per unit throughout the period. Calculate the May raw materials purchases in dollars. Raw material purchases cost