#FIG 2.1 80 2 1 4 0 5 0 0 0 0 0.00000 1 0.000 261 176 44 44 224 199 299 154 1 4 0 5 0 0 0 0 0.00000 1 0.000 536 176 47 47 499 204 574 149 1 4 0 5 0 0 0 0 0.00000 1 0.000 164 431 42 42 124 444 204 419 1 4 0 5 0 0 0 0 0.00000 1 0.000 376 424 41 41 344 449 409 399 1 4 0 5 0 0 0 0 0.00000 1 0.000 574 421 46 46 534 444 614 399 2 1 0 1 0 0 0 0 0.000 -1 0 0 79 44 509 44 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 0 119 449 104 454 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 0 124 444 114 429 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 0 619 429 694 429 709 479 9999 9999 2 2 0 5 0 0 0 0 0.000 0 0 0 769 534 769 474 669 474 669 534 769 534 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 1 0 0 5.000 20.000 40.000 194 399 239 364 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 0 334 309 239 309 239 384 339 384 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 0 79 579 79 579 779 579 9999 9999 2 1 0 5 0 0 0 0 0.000 -1 0 0 79 594 779 594 9999 9999 3 2 0 5 0 0 0 0 0.000 1 0 0 0 5.000 20.000 40.000 79 204 139 184 224 199 9999 9999 0.000 0.000 112.426 189.853 127.426 184.853 154.796 182.836 176.046 186.586 0.000 0.000 3 2 0 5 0 0 0 0 0.000 1 0 0 0 5.000 20.000 40.000 299 199 389 184 499 204 9999 9999 0.000 0.000 350.353 187.632 372.853 183.882 408.786 184.145 436.286 189.145 0.000 0.000 3 2 0 5 0 0 0 0 0.000 1 0 0 0 5.000 20.000 40.000 579 199 624 184 679 204 9999 9999 0.000 0.000 603.557 187.626 614.807 183.876 635.342 184.153 649.092 189.153 0.000 0.000 3 2 0 5 0 0 0 0 0.000 0 0 69 459 94 439 124 449 9999 9999 0.000 0.000 80.784 445.242 87.034 440.242 100.880 437.773 108.380 440.273 0.000 0.000 3 2 0 5 0 0 0 0 0.000 1 0 0 0 5.000 20.000 40.000 204 444 279 429 279 429 344 449 9999 9999 0.000 0.000 247.093 434.053 265.843 430.303 279.000 429.000 279.000 429.000 290.799 430.774 307.049 435.774 0.000 0.000 3 2 0 5 0 0 0 0 0.000 1 0 0 0 5.000 20.000 40.000 414 444 479 429 534 449 9999 9999 0.000 0.000 450.244 431.987 466.494 428.237 489.972 429.670 503.722 434.670 0.000 0.000 4 0 0 30 0 1 0 0.00000 4 26 424 79 39 A customers view of a Cash Register 4 0 0 30 0 0 0 0.00000 4 26 149 79 89 OLD System 4 0 0 20 0 5 0 0.00000 4 17 564 79 179 product cost sum cost & running total display receipt 4 0 0 30 0 0 0 0.00000 4 26 158 79 299 NEW System 4 0 0 20 0 5 0 0.00000 4 11 100 84 449 cost 4 0 0 20 0 5 0 0.00000 4 17 597 79 424 UPC lookup descriptor & cost sum running total display receipt 4 0 0 20 0 5 0 0.00000 4 11 70 679 504 customer 4 0 0 20 0 5 0 0.00000 4 13 115 249 344 UPC cost table 4 0 0 25 0 0 0 0.00000 4 17 97 79 684 Interfaces 4 0 0 25 0 0 0 0.00000 4 23 642 119 729 mechanical cash register column per digit electronic cash register 4 0 0 25 0 0 0 0.00000 4 22 63 119 774 (ECR)