How can I correctly assume ending inventory shown in the bottom slide, where did the $5000 come from?

The Production Budget Ele Edt ew Insert Fgrmat ools Dsta Window Help Adobe POF N43 21 22 Budgeted Sales 23 Add: Desired ending inventory 10,000 24 Total Needs 25 Less: Beginning inventory 26 Required production 27 April 20,000 50,000 30,000 May June Quarter 100,000 26,000 Budgeted May sales Desired ending inventory %) 20% Desired ending inventory10,000 50,000 March 31 ending inventory The Production Budget -10B N40 April 20,000 21 22 Budgeted Sales 23 Add: Desired ending inventory 10,000 6,000 5,000 24 Total Needs 25 Less: Beginning inventory 26 Required production 27 day 50,000 Quarter 30,000 100,000 5,000 30 26,000000 46,000 4,000 10,0006,000 4,000 101,000 Assumed ending inventory