Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Model | PPI (pixels per inch ) | ppcm (pixels per cm ) | Resolution | Typical viewing distance (in/cm) | Pixels per degree (PPD) |
| --- | --- | --- | --- | --- | --- |
| iPhone 4 / 4S and iPod Touch (4th generation) | 326.0 | 128.0 | 960×640 | inches (cm) | 57.0 |
| iPhone 5 / 5S / 5C and iPod Touch (5th generation) | 326.0 | 128.0 | 1136×640 | inches (cm) | 57.0 |
| iPad ( 3rd / 4th generation / iPad Air ) | 264.0 | 105.0 | 2048×1536 | inches (cm) | 69.0 |
| iPad Mini (2nd generation) | 326.0 | 128.0 | 2048×1536 | inches (cm) | 85.0 |
| MacBook Pro with Retina Display 15" | 220.0 | 87.0 | 2880×1800 | inches (cm) | 77.0 |
Question:
How many different PPI does the model with ppcm of 87 have?
Answer:
1.0