Wattan Company reports beginning inventory of 21 units at $60 each. Every week for four weeks it purchases an additional 21 units at respective costs of $61, $62, $65, and $70 per unit for weeks 1 through 4. Compute the cost of goods available for sale and the units available for sale for this four-week period. Assume that no sales occur during those four weeks. Units Units cost Cost of Goods Available Activity Beginning Inventory 1st week purchase 2nd week purchase 3rd week purchase 4th week purchase Units available for sale Cost of goods available for sale