Sarasota Limited uses a perpetual inventory system. The inventory records show the following data for its first month of of

$\backslash$table$[[$Date$,$Explanation,Units,Unit Cost$/$Price$,$Total Cost,Balance in Units$],[$Aug$.2,$Purchases,$270,$$$70,$$$18,900,270],[3,$Purchases,$540,100,54,000,810],[10,$Sales,$(320),150,,490],[15,$Purchases,$980,120,117,600,1,470],[25,$Sales,$(350),180,,1,120]]$