Alexander felt that Ptolomy might have underestimated the speed of the army on the paved road and he made his own calculations.
He used the top marching speed the Romans achieved- thirty-six kilometers a day, and got the result that the army would be here in twelve days!
This was wholly insufficient, as just recruiting, arming, and forming proper formations for fifty thousand raw recruits, with all the squad captains, captains, stratos, and legigus (ten thousand men leader) would take a minimum of a week.
But there was nothing Alexander do about that now.
It was what it was.
So Alexander decided to make the most of a bad situation.
He decided to ask for more stuff.
"Three weeks is really short Your Majesty. I'm afraid the soldiers will need more remuneration," Alexander euphemistically raised the question of payment
"You mean you want more from me. Well, go ahead then," Ptolomy in a rare display of foul mood, curtly tore off the shred of pretense.