pre_text: SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS For the years ended December: (in millions) (1) Excludes approximately $5.6 million of reserves related to notes receivable and tax refund receivables originated in 2016. (2) Excludes approximately $0.4 million of reserves related to non-trade receivables. (3) Amounts represent gross revenue and cost reversals to the estimated sales returns and allowances accounts. (4) Amounts in 2019 and 2018 are reported within accrued expenses and other current liabilities, as Product Returns Liability (see Note 4 and 9). (5) Amounts in 2019 and 2018 are reported within prepaid expenses and other current assets.
table: Description Balance at Beginning of Period Write-offs Other Balance at End of Period
table: Allowance for doubtful accounts
table: 2019 $1.0 $1.0 $(0.8) $0.0 $1.2 (1)
table: 2018 $1.1 $0.7 $(0.8) $0.0 $1.0 (1)
table: 2017 $9.1 $1.0 $(0.9) $0.0 $1.1 (1) (2)
table: Allowance for sales returns (4)
table: 2019 $0.0 $0.0 $0.0 $0.0 $0.0
table: 2018 $0.0 $0.0 $0.0 $0.0 $0.0
table: 2017 $1.4 $1.4 $0.0 $(1.4) (3) $1.4
table: Allowance for inventory returns (5)
table: 2019 $0.0 $0.0 $0.0 $0.0 $0.0
table: 2018 $0.0 $0.0 $0.0 $0.0 $0.0
table: 2017 $(0.6) $(0.5) $0.0 $0.6 (3) $(0.5)
table: Allowance for deferred tax assets
table: 2019 $18.3 $(0.3) $0.0 $(1.2) $16.8)
table: 2018 $18.3 $(0.3) $0.0 $0.3 $18.3
table: 2017 $69.0 $(28.6) $(2.9) $(19.2) $18.3
question: Analyse this data from a financial earnings document. What is the total allowance for doubtful accounts charged to expenses between 2017 to 2019?