I only know how to say one thing in Arabic ( or it may be Berber). Its pronounced "Ub shell-a Hobs" with a very harsh ach sound at the beginning of "hobs " it means "how much is the bread?" - that's interesting.
Khubz is definitely Arabic for bread. I've learnt that kam means 'how many' and bikam means 'how much' ... so 'how much is the bread?' would be bikam al-khubz? according to what I've learnt.
There are many types of Arabic - I'm learning Modern Standard Arabic (al-fusha), with some emphasis on informal speech. Arabs don't usually speak this variety. They usually speak dialect.
Al-fusha is used in politics, in newspapers, and when Arabs wish to communicate with other Arabs who speak an unintelligible dialect. E.g. if an Iraqi and a Moroccan talked to each other, they'd likely both switch to al-fusha.
It's also used in well-known phrases such as Allahu akbar and as-salaamu 3alaykum.
Did you learn your Arabic phrase during a trip to Morocco or Tunisia perhaps?