'decimal:2', 'output_amount' => 'decimal:2', 'input_amount' => 'decimal:2', ]; public static function columnLabels(): array { return [ 'store_name' => '店铺名称', 'store_entity' => '店铺主体', 'invoice_issuer' => '开票员', 'invoice_limit' => '开票额度', 'output_amount' => '销项金额', 'input_amount' => '进项金额', 'period' => '期间', ]; } }