A company's inventory records report the following:

$\backslash$table$[[$Date$,$Activities,Units Acquired at Cost,Units Sold at Retail$],[$August $1,$Beginning inventory,$15$ units @ $$28=$$$420,],[$August $5,$Purchase,$10$ units @ $$29=$$$290,],[$August $12,$Purchase,$20$ units @ $$30=$$$600,],[$August $15,$Sales,,$30$ units sold$]]$

Using the FIFO perpetual inventory method, what is the value of the inventory at August $15$ after the sale?