Access Nested Netsuite Ruby Hash - ruby-on-rails

Question

I am trying to access a Netsuite Ruby Hash (Netsuite gem) and return orders which need updating from the db, the process uses two service objects, one to get the orders from db, (ListOrdersService), and the this file to compare those against modified ones in Netsuite. Is all working except I am having problems getting some of the nested values in Netsuite in to the output. Code is below with a troublesome item commented out. Its just an each method which compares dates then puts the needed orders in returned value.
def process_order_updates
get_order_updates = []
# Get all our open orders from DB
bj_open_orders = ListOrdersService.new.call
# Get all identical open orders from Netsuite
bj_open_orders.each do |item|
netsuite_sales_orders = NetSuite::Records::SalesOrder.get(item['sales_order_internal_id'])
# Compare the last modified date from Netsuite to the last checked date from app DB
if netsuite_sales_orders.present? && netsuite_sales_orders.last_modified_date > item['last_checked_date']
# If the last modified date is newer, then we create a new hash with the updated order info
get_order_updates << {
sales_order_internal_id: item['sales_order_internal_id'],
order_status: item['order_status']
# quantity_fulfilled: item['items_list']['item']['quantity_fulfilled']
}
puts "still open order #{item['sales_order_internal_id']} needs to be updated, it was last checked by at #{item['last_checked_date']} but it was just modified, on #{netsuite_sales_orders.last_modified_date}"
end
end
puts "Here are the orders that need to be updated: #{get_order_updates}"
end
The Netsuite file code I am referencing is below, and trying to get quantity_fulfilled, quantity_billed, and some others in the file. items_list is a top level item
"item_list": {
"list": [
{
"attributes": {
"item": {
"internal_id": "110",
"external_id": null,
"type": null,
"attributes": {
"name": "000002 Kerosene (UN1223) 3.PGIII (D/E)"
}
},
"expand_item_group": false,
"quantity": "1000.0",
"units": {
"internal_id": "1",
"external_id": null,
"type": null,
"attributes": {
"name": "ltr"
}
},
"description": "Kerosene (UN1223) 3.PGIII (D/E)",
"price": {
"internal_id": "-1",
"external_id": null,
"type": null,
"attributes": {}
},
"rate": "0.81",
"amount": "810.0",
"is_closed": false,
"gross_amt": "850.5",
"line": "1",
"cost_estimate_type": "_averageCost",
"cost_estimate": "900.79",
"quantity_back_ordered": "0.0",
"quantity_billed": "0.0",
"quantity_committed": "1000.0",
"quantity_fulfilled": "0.0",
"tax1_amt": "40.5",
"tax_code": {
"internal_id": "2214",
"external_id": null,
"type": null,
"attributes": {
"name": "VAT:RDR-5%"
}
},
Any tips on how to get those items, directly or with a hashmap welcome Thanks