Graham Inc. has an outstanding loan which had a beginning balance of $$50,000.$ The ending balance is $$45,000.$ You ascertain from the income statement footnotes that the interest expense for the year was $$1,000.$ There's a new debt issued during the period for $$10,000.$ No interest is capitalised. How much of the principal was repaid during the year?

Principal repayment $($$$)$: