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

}