Beginning inventory has $10$ units at $$60$ each. An additional $10$ units are purchased in each of the next three weeks at respective costs of $$61,$$$62,$ and $$65$ per unit for weeks $1,2,$ and $3.$ Determine the cost of goods available for sale for this three$-$week period. Assume that no sales occur during those three weeks.

$\backslash$table$[[$Activity$,$Units,Units cost,$\backslash$table$[[$Cost of Goods$],[$Available$]]],[$Beginning Inventory,,,$],[1$st week purchase,,,$],[2$nd week purchase,,,$],[3$rd week purchase,,,$],[$Units available for sale,,$0,],[$Cost of goods available for sale,,,$