. "The federal or new ready reckoner and trader[']s useful assistant in buying and selling all sorts of commodities, either wholesale or retail adapted to the federal money : shewing at one view the amount or value of any number or quantity of goods or merchandise from half a cento to one dollar and upwards either by weight or measure : together with interest tables, &c., in so plain and easy a manner that persons quite unacquainted with arithmetic may hereby ascertain the value in federal money or any quantity of goods in weight or measure at any price whatever"@en . . . . "The federal or new ready reckoner and trader['] useful assistant in buying and selling all sorts of commodities, either wholesale or retail adapted to the federal money : shewing at one view the amount or value of any number or quantity of goods or merchandise from half a cento to one dollar and upwards either by weight or measure : together with interest tables, &c., in so plain and easy a manner that persons quite unacquainted with arithmetic may hereby ascertain the value in federal money or any quantity of goods in weight or measure at any price whatever"@en . . "Traders useful assistant"@en . . . . . . "Electronic books"@en . "Early works"@en . . . "Ready-reckoners Early works to 1800." . . "Ready-reckoners." . .