Cumulate count querys with mysql and GROUP BY - php

Question

In the following fictionalized example, there is the (main) table country_sales.
In each added record can be added several cars and several radios.
I need to make cumulative queries for a search/count component.
if ($group == 'cars'){
$query = "SELECT COUNT (cs.id_cars) AS total, tc.desc_cars AS isname
FROM cars_sold cs, tab_cars tc, country_sales csa
WHERE csa.status = 1
AND tc.id_cars = cs.id_cars
AND csa.id_name = tc.id_name ";
}
if ($group == 'extras'){
$query = "SELECT COUNT (es.id_radio) AS total, tc.desc_radio AS isname
FROM radio_sold es, tab_radio tex, country_sales csa
WHERE csa.status = 1
AND tex.id_radio = es.id_radio
AND csa.id_name = tex.id_name ";
}
if($cars > 0 ){
$query .= " AND csa.id_name IN(SELECT id_name FROM tab_cars WHERE id_cars = ? )";
}
if($extras > 0 ){
$query .= " AND csa.id_name IN(SELECT id_name FROM tab_extras WHERE id_extras = ? )";
}
$query .= " GROUP BY isname";
If the option is group (by) cars and the car is Ford Mustang, I get not only the number of Ford Mustang cars sold, but also a list of all other models sold.
The same is true for radios sold.
If the query cumulates cars and radios works but still displays a list of all cars or all radios sold according to the criteria GROUP BY
What I try to achieve is to get only one row with the desired count. For example and only 80 Ford Mustang.
I tried the following:
if ($group == 'cars'){
$query = "SELECT COUNT (cs.id_cars) AS total, tc.desc_cars AS isname
FROM cars_sold cs
LEFT JOIN tab_cars tc ON cs.id_cars = tc.id_cars
LEFT JOIN country_sales csa ON tc.id_name = csa.id_name
WHERE csa.status = 1 ";
}
if ($group == 'extras'){
$query = "SELECT COUNT (es.id_radio) AS total, tc.desc_radio AS isname
FROM radio_sold es
LEFT JOIN tab_radio tex ON es.id_radio = tex.id_radio
LEFT JOIN country_sales csa ON tex.id_name = csa.id_name
country_sales csa
WHERE csa.status = 1 ";
}
if($cars > 0 ){
$query .= " AND id_cars = ? ";
}
if($extras > 0 ){
$query .= " AND id_extras = ? ";
}
$query .= " GROUP BY isname";
Problem:
If I search by cars or radio, I get a single row with the desired result.
However cumulate querys for cars and radios does not work.
Any ideas how to solve it?