Step 1: Measure the room length and width.

Step 2: Calculate the area by multiplying the length by the width.

Formula: $$\text{Area} = \text{Length} \times \text{Width}$$

Step 3: Add the waste factor to the total area.

Formula: $$\text{Total Area} = \text{Area} \times (1 + \text{Waste Factor})$$

Step 4: Calculate the total cost by multiplying the total area by the price per square foot (if provided).

Formula: $$\text{Total Cost} = \text{Total Area} \times \text{Price per Square Foot}$$

Let's say you have a room that is 20 feet long and 15 feet wide, with a waste factor of 5%, and a price per square foot of $3.00.

Step 1: Calculate the area:

$$\text{Area} = 20 \times 15 = 300 \text{ sq ft}$$

Step 2: Add the waste factor:

$$\text{Total Area} = 300 \times (1 + 0.05) = 300 \times 1.05 = 315 \text{ sq ft}$$

Step 3: Calculate the total cost:

$$\text{Total Cost} = 315 \times 3.00 = 945.00$$

So, you would need 315 sq ft of flooring, and the total cost would be $945.00.