In: Statistics and Probability
A chemical company produces a special industrial chemical that is a blend of three chemical ingredients. The beginning-year cost per pound, the ending-year cost per pound, and the blend proportions follow. (Round your answers to the nearest integer.)
| Cost per Pound ($) | |||
|---|---|---|---|
| Ingredient | Beginning | Ending | Quantity
(pounds) per 100 Pounds of Product  | 
| A | 1.50 | 3.45 | 25 | 
| B | 8.75 | 9.90 | 10 | 
| C | 0.99 | 0.90 | 70 | 
(a)
Compute the price relatives for the three ingredients.
| Item | Price Relative | 
|---|---|
| A | |
| B | |
| C | 
(b)
Compute a weighted average of the price relatives to develop a one-year cost index for raw materials used in the product.
I =
What is your interpretation of this index value?
Cost of raw materials is up % for the chemical.