Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: He called and was happy to give permission . We bought the tile today ... he said just send him the reciept and hold the amount out of the next month 's rent . No problem , no arguing , no complaining . Simple as that .

Question: What may have caused to hold the amount out of next month 's rent ?
The stuff we purchased would benefit his property .
His permission to use the money for buying the tile.