The term 'halves of SAWBUCKS' refers to five-dollar bills, which are also known as FIVERS (6 letters). FIVERS are the smallest denomination of paper currency in the United States and are often referred to colloquially as 'SAWBUCKS' due to their resemblance to a sawbuck, a device used to hold wood when sawing. The term 'halves of SAWBUCKS' is used to refer to two five-dollar bills, which together make up the equivalent of a ten-dollar bill.