This is accomplished by placing a narrow strip of paper over the quantity column of the duplicate invoice, but under the carbon paper. The quantity figures manifold onto the strip of paper instead of onto the duplicate invoice. This plan is termed _using a blind_. The narrow strip of paper between the invoice and duplicate is the _blind_ described a little further on. The next step in short cutting work is the printing of a label in connection with the invoice and sales sheet. In the book business, where it is generally possible to fill orders from stock, and where the invoice can be made before the goods are shipped, it is possible to place a small piece of paper (the label) between a folded invoice in such a manner that when the name is written on the invoice it manifolds onto the label as well as onto the duplicate invoice and sales sheet. =Analysis of Quantities and Amounts.= In certain lines of business which sell three or four varieties of goods, it is desirable to analyze the weights or quantities in the proper columns, which in turn manifold onto the sales sheets, as shown in Fig. 14. [Illustration: Fig. 14. Sales Sheet for Analyzing Quantities and Amounts of Goods ] This saves a great deal of time as compared with making out the same invoice in the following way: 3000 # Brass Rods @20 $60.00 2500 # Brass Bars @21 $52.50 1000 # Zinc Bars @15 $15.00 By following the first plan, all of the weights for the respective classes of goods will be manifolded into the proper columns, and it is therefore an easy matter to total each column, and at the end of the month the classification of sales will be totaled according to weights as well as according to dollars and cents. The invoice is ruled to match the sales sheet. =Information on Sales Sheet Not on Invoice.= In certain lines of business, such as wire-screen manufacture, it is desirable at times to substitute the next size of wire in order to fill orders promptly. In such cases, it is necessary to have the invoice show the size of wire ordered, but to have the sales sheet show the size really sent. It would seem impossible therefore to write _No. 8 wire_ on the invoice and have _No. 9 wire_ manifold on the sales sheet. The idea used to accomplish the desired result is to place the invoice in such a position with relation to the sales sheet that a margin is left on the left-hand side of the sales sheet, which would permit the operator typewriting directly on the sales sheet, and placing thereon the actual size of the wire shipped. The size ordered would be written on the invoice in the regular manner, and of course would manifold onto the sales sheet.