Table:
0
A
B
C
D
1
Year Ended December 31,
2
(In thousands)
2019
2018
2017
3
Balance at beginning of year
$4,421
$6,667
$2,813
4
Provision charged to expense
9,347
8,793
7,072
5
Write-offs, less recoveries
(9,219)
(11,039)
(6,516)
6
Acquired allowance for doubtful accounts
—
—
3,298
7
Balance at end of year
$4,549
$4,421
$6,667

Questions and formulas:
Question: What was the increase / (decrease) in the balance at beginning of year from 2018 to 2019?
Formula: C7 - D7
Formula2: C7 - D7
Level: Calculation
Question: What was the average provision charged to expense for 2017-2019?
Formula: (B4 + C4 + D4) / 3
Formula2: (B4 + C4 + D4) / 3
Level: Calculation
Question: What was the increase / (decrease) in the Acquired allowance for doubtful accounts from 2017 to 2018?
Formula: 0 - D6
Formula2: 0 - D6
Level: Calculation