Traffic +$28.14, conversion +$30.66 and AST −$3.29 sum to +$55.51 — the sales gap, to the cent. Residual interaction $0.00. sequential (waterfall) attribution, fixed driver order traffic -> conversion -> AST; AST split AUS -> UPT
Driver contributions
Driver
Contribution to the gap
TRAFFIC
+$28.14
CONVERSION
+$30.66
AST
−$3.29
Sum = the sales gap
+$55.51
Residual interaction
$0.00
AST splits into
Contribution to the gap
AUS
−$13.23
UPT
+$9.94
Sum = the AST contribution
−$3.29
Sequential attribution telescopes exactly, so the residual is zero by construction — it is computed and shown rather than assumed (BR-20). Both columns above are shown to the cent so that they sum to their own totals as printed.
What if — the calculator
Checking the calculator against the catalog…
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This calculator holds no formula. It is handed the catalog's own driver values and evaluates the catalog's own identity; it verifies that it reproduces the catalog's figure before it will let you touch a slider (BR-20).
Colour tokens: gold = an input the business asserted · blue = a figure presented as given · green = calculated here. Dotted underline = hover for the formula.