InstaChat Company provides legal services and sells refurbished computers. On January $1,201,$ its supplies account had a balance of $$10,000.$ It purchased $$12,000$ worth of supplies during the year. On December $31,20$X$1,$ the end of the accounting period, a count revealed that there were $$4,000$ of supplies still on hand. Calculate the amount of supplies used during the period. Do not include commas, dollar signs or text.