ABCorp shows the following sales-related figures for its fiscal/calendar year 2020:

Gross Revenues	$1800
Credit Sales (Payable in 2021)	400
Costs of Items Sold (All units cost the same amount)	900
Returns (all returns cleaned at a cost of $100, and restocked for sale in 2021)	200
Defective Units Returned & Destroyed; New Items Sent to Customers at no Charge (at Cost)	100
Inventory January 1, 2020	1600
Inventory Acquired During 2020	600
Inventory Acquired on Account, Payable in 2021	200
Spoliage During 2020	400

Assuming no other information is available or relevant, what is the DOLLAR VALUE of ABCorp'sl:

1. Inventory on December 31, 2020?

2. Gross Margin for FY 2020?