$($amount realized$)$ Scrap$-$Happy $($SH$),$ a sole proprietorship, owns a warehouse which is subject to a $$45,000$ mortgage. A manufacturing company offers to purchase the warehouse for $$20,000$ cash and a $$25,000$ note receivable, and it agrees to assume the $$45,000$ mortgage on the property. If $SH$ accepts this offer, and pays $$1,800$ in selling expenses, what is SH$\text{'}$s amount realized?

$\backslash$table$[[,],[,],[,],[$Amount realized,$]]$