A 6 pound bag of oranges cost 6.78 What is the unit price?

Can somebody me out with this question

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i