Because it's a 90% discounted rate, so he is selling just one ice cream to one person.
Jose Mourinho went to the shop and gave the Pegg $2 and without asking Jose the seller gives him the Choco-mix ice cream cone.
Next, Pep Guardiola comes and also gave the Pegg the same amount i.e. $2.
Now Pegg asks Guardiola which flavour cone does he wants.
Why so different behaviours towards Jose and Pep ?