Question 13

The vector $\mathbf{u} = 50\mathbf{i} + 75\mathbf{j} + 65\mathbf{k}$ shows how many belts, pants, and shirts were sold at a store. The vector $\mathbf{w} = 1500\mathbf{i} + 3500\mathbf{j} + 3000\mathbf{k}$ shows the price (in rupees) of each item. Find $\mathbf{u} \cdot \mathbf{w}$ and explain what the result tells us in real life.