// ---- Weekly VBs (current calendar week, Sun 00:00 - Sat 23:59 Eastern) ----
            // Callers have a $500/week VB limit. Sum tips across calls, custom_audios,
            // and paid_emails for this caller within the current week.
            // Matched the same way as call history: last-name prefix + first initial.
            $today = new \DateTime('now', new \DateTimeZone('America/New_York'));
            $dow = (int) $today->format('w'); // 0 = Sunday
            $weekStart = (clone $today)->modify("-{$dow} days")->setTime(0, 0, 0);
            $weekEnd = (clone $weekStart)->modify('+6 days')->setTime(23, 59, 59);
            $wkFrom = $weekStart->format('Y-m-d');
            $wkTo = $weekEnd->format('Y-m-d');

            $vbParams = [
                'last_prefix' => $lastPrefix,
                'wk_from' => $wkFrom,
                'wk_to' => $wkTo,
            ];
            $initialClause = '';
            if ($firstInitial !== '') {
                $initialClause = " AND UPPER(LEFT(callerfirst, 1)) = :first_initial";
                $vbParams['first_initial'] = $firstInitial;
            }

            foreach (['calls' => 'calldate', 'custom_audios' => 'auddate', 'paid_emails' => 'auddate'] as $tbl => $dateCol) {
                $q = $this->pdo->prepare(
                    "SELECT COALESCE(SUM(tip),0) FROM {$tbl}
                     WHERE UPPER(callerlast) = :last_prefix{$initialClause}
                       AND {$dateCol} BETWEEN :wk_from AND :wk_to"
                );
                $q->execute($vbParams);
                $weeklyVbs += (float) $q->fetchColumn();
            }