The cost of material used to make a product and cost of labor used to make the product is associated specifically with a single of sale.

unit

Step-by-step explanation:

The cost of material used to make a product and cost of labor used to make the product is associated specifically with a single of sale

The above is your fulll question, I think the correct answer is "unit". Because the unit for calculating the cost in question is not yet clear as to which currency and we dont use hour to caculate the cost as well and dozen of sale has no meaning in this situation.

Hence, we use unit to generally display the cost.

Step-by-step explanation:

Total no. of pants(jeans + formal) = 2+2 = 4

total no. of shirts(denim + formal) = 3+4 = 7

Q.18

No. of ways Leela selected outfit = 4 * 7 = 28

so  the answer is (d)

Q.19

Formal = shirts * pants

            = 3 * 2 = 6

Denim = denim shirt * jeans

           = 4 * 2 = 8

Total no. of ways = 6 + 8 = 14

so the answer is (b)

E