Get tickets available with their price - mysql

Question

I'm tyring to get this query, but I think all the joins and sub queries are getting me confused, and it uses every table in my database.
CREATE TABLE Zone(
name char(12) not null,
price_multiplier float not null default 1.0,
primary key (name)
);
CREATE TABLE Seat(
row_no char(3) not null,
zone_name char(12) not null,
primary key (row_no),
foreign key (zone_name)
references Zone(name)
);
CREATE TABLE Production(
title varchar(100) not null,
url varchar(30) not null unique,
base_price numeric(5,2) not null,
mins smallint default 90,
genre varchar(30),
description text,
primary key (title)
);
CREATE TABLE Performance(
id mediumint not null AUTO_INCREMENT,
date_time datetime not null unique,
title varchar(100) not null,
primary key (id),
foreign key (title)
references Production(title)
);
CREATE TABLE Booking(
ticket_no mediumint not null AUTO_INCREMENT,
row_no char(3) not null,
performance_id mediumint not null,
customer_name varchar(300) not null,
primary key (ticket_no),
foreign key (row_no)
references Seat(row_no),
foreign key (performance_id)
references Performance(id)
);
If I run this query I can get the already booked seats with all the information:
SELECT
b.customer_name,
b.row_no,
s.zone_name,
ROUND(P.base_price * z.price_multiplier, 2) as ticket_price,
p.title,
p.date_time
FROM
Seat s
JOIN Booking b
ON s.row_no = b.row_no
JOIN Performance p
ON p.id = b.performance_id
JOIN Production P
ON p.title = P.title
JOIN Zone z
ON z.name = s.zone_name
WHERE
s.row_no IN
(
SELECT
b.row_no
FROM
Booking b
WHERE
b.performance_id = :perfID
)
;
I figured it out
SELECT
s.row_no,
s.zone_name,
ROUND(z.price_multiplier *
(
SELECT
P.base_price
FROM
Production P
JOIN Performance p
ON P.title = p.title
WHERE
p.id = :perfID
)
, 2) as price
FROM
Seat s
JOIN Zone z
ON s.zone_name = z.name
WHERE
s.row_no NOT IN
(
SELECT
s.row_no
FROM
Seat s
JOIN Booking b
ON s.row_no = b.row_no
WHERE
b.performance_id = :perfID
)
Thanks for your help.