Answer:
$335,700; $234,990
Explanation:
Under cost:
Goods available for sale:
= Beginning inventory + Purchases + Freight in + Net mark ups - Net markdowns
= 220,000 + 588,000 + 11,000 + 0 - 0
= $819,000
Under Retail:
Goods available for sale:
= Beginning inventory + Purchases + Freight in + Net markups - Net markdowns
= 283,000 + 864,000 + 0 + 23,000 - 4,300
= $1,165,700
Cost to retail ratio = $819,000 ÷ (283,000 + 864,000 + 0 + 23,000)
               = $819,000 ÷ $1,170,700
               = 0.7
Estimated ending inventory at retail:
= Goods available for sale(Retail) - Net sales
= $1,165,700 - $830,000
= $335,700
Estimated ending inventory at cost:
= Estimated ending inventory at retail × Cost to retail ratio
= $335,700 × 0.7
= $234,990