Using multiples

With curriculum night approaching, our school is expecting to sell hamburgers based on the amount of students in the intermediate didvion alone. all the students have yet to bring in their forms so purlely an etimated. the grade 7 students are in charge of buying the hamburgers and buns. the local store sels hamburgers in packs of 12 and buns in packs of 8. the school does not want to loose out on money, so the how many packs of hamburgers and buns should the school buy if they think they need around 192 hamburgers? EXTENTION: PRICE of the hamburgers are $10.99 and the PRICE of the buns are $3.99