Number of laptops (in thousands) sold by five brands over the years
| Year | Brand A | Brand B | Brand C | Brand D |
|---|---|---|---|---|
| 2016 | 135 | 125 | 125 | 40 |
| 2017 | 105 | 55 | 90 | 95 |
| 2018 | 125 | 40 | 195 | 55 |
| 2019 | 150 | 100 | 195 | 65 |
| 2020 | 80 | 45 | 165 | 110 |
12
What is the difference between the total sales in 2018 and in 2020 (in thousand laptops)?
Easy