diff --git a/app/src/Service/Contabilidad/Cartola/isExcel.php b/app/src/Service/Contabilidad/Cartola/isExcel.php
new file mode 100644
index 0000000..684ac1e
--- /dev/null
+++ b/app/src/Service/Contabilidad/Cartola/isExcel.php
@@ -0,0 +1,110 @@
+<?php
+namespace Incoviba\Service\Contabilidad\Cartola;
+
+use PhpOffice\PhpSpreadsheet;
+
+trait isExcel
+{
+    /**
+     * @throws PhpSpreadsheet\Exception
+     * @throws PhpSpreadsheet\Calculation\Exception
+     */
+    protected function findTitlesRow(PhpSpreadsheet\Worksheet\RowIterator &$rowIterator, string $firstTitle, int $columnOffset = 1, bool $caseInsensitive = false): ?PhpSpreadsheet\Worksheet\Row
+    {
+        if ($caseInsensitive) {
+            $firstTitle = strtolower($firstTitle);
+        }
+        foreach ($rowIterator as $row) {
+            $cellIterator = $row->getCellIterator();
+            if ($columnOffset > 1) {
+                $cellIterator->seek($columnOffset);
+            }
+            $value = ($cellIterator->current()->getCalculatedValue());
+            if ($value === null) {
+                continue;
+            }
+            if ($caseInsensitive) {
+                $value = strtolower($value);
+            }
+            $value = trim($value, '  ');
+            if ($value === $firstTitle) {
+                return $row;
+            }
+        }
+        throw new PhpSpreadsheet\Exception('No se encontró la fila de títulos');
+    }
+    /**
+     * @throws PhpSpreadsheet\Exception
+     * @throws PhpSpreadsheet\Calculation\Exception
+     */
+    protected function grabTitlesRow(PhpSpreadsheet\Worksheet\Row $row, int $columnOffset = 1, bool $toLower = false): array
+    {
+        $titles = [];
+        $cellIterator = $row->getCellIterator();
+        if ($columnOffset > 1) {
+            $cellIterator->seek($columnOffset);
+        }
+        while ($cellIterator->valid()) {
+            $title = trim($cellIterator->current()->getCalculatedValue(), '  ');
+            if ($toLower) {
+                $title = strtolower($title);
+            }
+            $titles[$cellIterator->current()->getColumn()] = $title;
+            $cellIterator->next();
+            if ($cellIterator->current()->getCalculatedValue() === null) {
+                break;
+            }
+        }
+
+        return $titles;
+    }
+    protected function grabRow(PhpSpreadsheet\Worksheet\Row $row, array $titles, int $columnOffset = 1, bool $process = false, ?array $titleValueMap = null): array
+    {
+        $data = [];
+        $cellIterator = $row->getCellIterator();
+        if ($columnOffset > 1) {
+            $cellIterator->seek($columnOffset);
+        }
+        while ($cellIterator->valid()) {
+            $col = $cellIterator->current()->getColumn();
+            $colIndex = PhpSpreadsheet\Cell\Coordinate::columnIndexFromString($col);
+            if (count($titles) + $columnOffset < $colIndex or ($colIndex >= $columnOffset and !key_exists($col, $titles))) {
+                break;
+            }
+            $title = $titles[$col];
+            $value = $cellIterator->current()->getCalculatedValue();
+            if ($process) {
+                $value = $this->processValue($titleValueMap, $title, $value);
+            }
+            $data[$title] = $value;
+            $cellIterator->next();
+        }
+        return $data;
+    }
+    protected function processValue(array $titleValueMap, string $title, mixed $value): mixed
+    {
+        if (!key_exists($title, $titleValueMap)) {
+            return $value;
+        }
+        return match (strtolower($titleValueMap[$title])) {
+            'fecha' => (int) $value != $value
+                ? implode('-', array_reverse(explode('-', $value)))
+                : PhpSpreadsheet\Shared\Date::excelToDateTimeObject($value, 'America/Santiago')->format('Y-m-d'),
+            'int' => (int) $value,
+            default => $value,
+        };
+    }
+    protected function isExitValue(PhpSpreadsheet\Worksheet\Row $row, array $exitValues, int $columnOffset = 1): bool
+    {
+        $cellIterator = $row->getCellIterator();
+        if ($columnOffset > 1) {
+            $cellIterator->seek($columnOffset);
+        }
+        foreach ($exitValues as $exitValue) {
+            if ($cellIterator->current()->getCalculatedValue() === $exitValue) {
+                return true;
+            }
+        }
+        return false;
+    }
+}