COMPLETE ALL $5$ STEPS : Scoresby Incorporated tracks the number of units purchased and sold throughout each year but applies its inventory costing method at the end of the year, as if it uses a periodic inventory system. Assume its accounting records provided the following information ai the end of the annual accounting period, December $31.$

$\backslash$table$[[$Transactions$,$Units,Unit Cost$],[$a$.$ Inventory, Beginning,$1,500,$$$20$