Answer:
$1,420,000
Explanation:
supplies expense for the year = beginning balance of supplies account + supplies purchases - ending balance of supplies account
$1,700,000 = $710,000 + supplies purchased - $430,000
$1,700,000 = $280,000 + supplies purchased
$1,700,000 - $280,000 = supplies purchased
$1,420,000 = supplies purchased