It says a kilo of rice on here, you know?Yep!Are you sure you want to buy it cooked?This menu shows that this is a bento shop; while there's no problem getting 1kg of cooked rice from them it's not something you'd normally do.
The first sentence uses 米 /kome/ to indicate raw, uncooked rice; the second use ご飯 /gohan/ to indicate ready-to-eat rice.You can get to eating cooked rice much faster than raw, see!