Table:
0
A
B
C
D
E
F
G
1
For the Years Ended December 31,
2
2019
2018
2017
3
Amount
% of Revenue
Amount
% of Revenue
Amount
% of Revenue
4
(In millions, except percentages)
5
Revenues
$13.2
100%
$82.3
100%
$50.5
100%
6
Cost of revenues
1.9
14%
15.3
19%
6.0
12%
7
Gross profit
11.3
86%
67.0
81%
44.5
88%
8
Operating expenses:
9
Selling, general and administrative (1)
31.7
240%
32.2
39%
28.6
57%
10
Research and development
2.0
15%
2.1
2%
1.5
3%
11
Total operating expenses
33.7
225%
34.3
41%
30.1
60%
12
Other income (expense)
(0.3)
(2)%
(4.0)
(5)%
2.2
4%
13
Income (loss) before income taxes
(22.7)
(172%)
28.7
35%
16.6
33%
14
Income tax provision (benefit)
(6.2)
(47%)
8.0
10%
(6.2)
(12)%
15
Net income (loss)
$(16.5)
(125)%
$20.7
25%
$22.8
45%
16
(1) Includes stock based compensation
$1.0
8%
$1.6
2%
$0.8
2%

Questions and formulas:
Question: What is the average revenue between 2017 to 2019?
Formula: (F5 + D5 + B5)/3 
Formula2: (F5 + D5 + B5)/3 
Level: Calculation
Question: What is the percentage change in cost of revenue between 2017 and 2018?
Formula: (D6-F6)/F6
Formula2: (D6-F6)/F6
Level: Calculation
Question: What is the percentage change in gross profit between 2018 and 2019?
Formula: (B7-D7)/D7
Formula2: (B7-D7)/D7
Level: Calculation