if I pay $5 for a pack of ice creams there are eight ice creams in the pack and I saw each one for $4 how much money would i make in a week if i continued

Selling each ice cream for $4, you would make a profit of $3 per ice cream ($4 selling price - $1 cost).

If you purchased a pack of ice creams for $5 and sold each ice cream for $4, you would make a profit of $3 per ice cream, and a total profit of $24 for the entire pack ($3 profit per ice cream x 8 ice creams in a pack).

If you were to continue selling ice creams every week, and assuming you are able to sell one pack of ice creams each week, you would make $24 in profit per week.