Determine which delivery alternative would be most economical for 110 boxes of parts. Each box costs $320 and the annual holding cost is 31% of the cost. Assume 365 days per year. Overnight delivery option costs $285 , and eight-day delivery option costs $125 .

a.

The eight-day option is at least $49 cheaper than overnight

b.

The overnight option is at least $49 cheaper than eight-day

c.

The overnight option is at least $98 cheaper than eight-day

d.

The eight-day option is at least $98 cheaper than overnight