src/SendPulseApi.php
public function campaignCost( $bookId ) {
        if( empty( $bookId ) ) {
            return $this->handleError( 'Empty book id' );
        }

        $requestResult = $this->sendRequest( 'addressbooks/' . $bookId . '/cost' );

        return $this->handleResult( $requestResult );
    }
public function campaignCost( $bookId ) {
        if( empty( $bookId ) ) {
            return $this->handleError( 'Empty book id' );
        }

        $requestResult = $this->sendRequest( 'addressbooks/' . $bookId . '/cost' );

        return $this->handleResult( $requestResult );
    }
Get cost of campaign based on address book

@param $bookId
@return mixed|stdClass