Problem 10-21 Apply the EOQ model to the following quantity discount situation in which D = 500 units per year, Co = $40, and the annual holding cost rate
is 20%.
Discount
(%)
Discount
Category
1
2
Order Size
O to 99
100 or more
0
Unit Cost
$10.00
$9.70
3
What order quantity do you recommend? If required, round your answer to the nearest whole number.

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?