Customer        | Money spent
-----------------+-------------
 Fred Flintstone | 1000
 Barney Rubble   | 2000
 ...             | ...

##</code><code>##

foreach my $customer (keys %money_spent) {
    my $money_sent_by_this_customer = $money_spent{$customer};
    
    # do something with $customer and $money_spent_by_this_customer

}

##</code><code>##

foreach my $customer (keys %myHash) {
    my $money_sent_by_this_customer = $myHash{$customer}->{"money"};
    
    # do something with $customer and $money_spent_by_this_customer

}

##</code><code>##

foreach my $customer (keys %myHash) {
    my $money_sent_by_this_customer_at_9am = $myHash{$customer}->{"money9am"};
    my $money_sent_by_this_customer_at_3pm = $myHash{$customer}->{"money3pm"};
    
    # do something with $customer, $money_spent_by_this_customer_at_9am and $money_spent_by_this_customer_at_3pm

}