PLEASE HELP Summarizing Data-Aggregate Functions Exercise giving me different results

SQL
1

I’m getting different results on the summarizing data/aggregate functions exercise and my code is the same as mosh’s, here is my code:
@Mosh :sob:

SELECT 
	'First half of 2019' AS range_date,
    SUM(invoice_total) AS total_sales,
	SUM(payment_total) AS total_payments,
    SUM(invoice_total - payment_total) AS what_we_expect
FROM invoices
WHERE invoice_date BETWEEN '2019-01-01' AND '2019-06-30	'

UNION

SELECT 
	'Second Half of 2019' AS range_date,
    SUM(invoice_total) AS total_sales,
	SUM(payment_total) AS total_payments,
    SUM(invoice_total - payment_total) AS what_we_expect
FROM invoices
WHERE invoice_date BETWEEN '2019-07-01' AND '2019-12-30'

UNION

SELECT 
	'total' AS range_date,
    SUM(invoice_total) AS total_sales,
	SUM(payment_total) AS total_payments,
    SUM(invoice_total - payment_total) AS what_we_expect
FROM invoices
WHERE invoice_date 
	BETWEEN '2019-01-01' AND '2019-06-30'

HERE ARE MY RESULTS

| range_date            | total_sales | total_payments | what_we_expect |
|-----------------------|-------------|----------------|----------------|
| total                | 1539.07     | 212.97         | 1326.10        |
| Second Half of 2019   | 1051.53     | 148.41         | 903.12         |
| First half of 2019    | 1539.07     | 212.97         | 1326.10        |