What is the total opening balance for receivables and inventories as of August 31, 2018?
{"Receivables": {"Ending Balance as of August 30, 2018": 5478, "ASU 2016-16": "$\u2014", "ASC 606": 114, "Opening Balance as of August 31, 2018": 5592}, "Inventories": {"Ending Balance as of August 30, 2018": 3595, "ASU 2016-16": "\u2014", "ASC 606": -5, "Opening Balance as of August 31, 2018": 3590}, "Other current assets": {"Ending Balance as of August 30, 2018": 164, "ASU 2016-16": -14, "ASC 606": 30, "Opening Balance as of August 31, 2018": 180}, "Deferred tax assets": {"Ending Balance as of August 30, 2018": 1022, "ASU 2016-16": 56, "ASC 606": -92, "Opening Balance as of August 31, 2018": 986}, "Other current liabilities": {"Ending Balance as of August 30, 2018": 521, "ASU 2016-16": "\u2014", "ASC 606": -4, "Opening Balance as of August 31, 2018": 517}, "Other noncurrent liabilities": {"Ending Balance as of August 30, 2018": 354, "ASU 2016-16": "\u2014", "ASC 606": 1, "Opening Balance as of August 31, 2018": 355}, "Retained earnings": {"Ending Balance as of August 30, 2018": 24395, "ASU 2016-16": 42, "ASC 606": 50, "Opening Balance as of August 31, 2018": 24487}}
total_receivables = df["Receivables"]["Opening Balance as of August 31, 2018"]
total_inventories = df["Inventories"]["Opening Balance as of August 31, 2018"]
answer = total_receivables + total_inventories