5. (total 16 points) brand w: 500 napkins for $2.87 brand x: 200 napkins for $1.27 brand y: 100 napkins for $0.62 brand z: 250 napkins for $1.37 a. which brand is the cheapest? what is the cost of one napkin of this brand? (total 8 points; 4 points for the answer, 2 points for the units labeled and 2 points for work shown or explanation) b. which brand is the most expensive? what is the cost of one napkin of this brand? (total 8 points; 4 points for the answer, 2 points for the units labeled and 2 points for work shown or explanation)
In cents, what is the least total amount that cannot be obtained by using a combination of fewer than eight coins from a collection of pennies, nickels, dimes and quarters?