1\begin{table}[htbp]\centering2\begin{threeparttable}3\caption{Fixed-basket cost under banner-count constraints (Model E, weekly means over 11 weeks, CAD)}\label{tab:basket}4\small5\begin{tabular}{lrrrrrr}6\toprule7Banners (B) & Items & Cost K=1 & Cost K=2 & Cost unconstrained & Savings share & Share captured at K=2 \\8\midrule94 & 18 & 78.72 & 68.97 & 66.86 & 0.15 & 0.82 \\105 & 15 & 67.28 & 58.50 & 56.92 & 0.15 & 0.85 \\116 & 11 & 49.27 & 45.05 & 43.66 & 0.11 & 0.75 \\127 & 9 & 31.01 & 28.33 & 27.28 & 0.12 & 0.72 \\13\bottomrule14\end{tabular}15\begin{tablenotes}[flushleft]\footnotesize16\item Complete-block design (amendment A-001): the $B$ widest-coverage storefront banners and the basket items all of them carry; item cost = cheapest unit price $\times$ reference quantity. K = 1: best single banner. Travel costs are unobserved; with an illustrative fixed cost per banner of 5 / 10 / 20 CAD the optimum uses 1.82 / 1.27 / 1.00 banners on average. Spread between the cheapest and most expensive single banner for the same items: 91\% of the cheapest.17\end{tablenotes}18\end{threeparttable}19\end{table}20