Identify the dimensions and calculate the volume of the base rectangular prism.

To calculate the volume of the object, we will break it down into two rectangular prisms: a base prism and a top prism.

Step 1: Identify the dimensions and calculate the volume of the base rectangular prism.
The base prism has a length ($L_1$) of 60 units, a width ($W_1$) of 35 units, and a height ($H_1$) of 10 units.
The formula for the volume of a rectangular prism is $V = L \times W \times H$.

$$V_1 = L_1 \times W_1 \times H_1$$ $$V_1 = 60 \times 35 \times 10$$ $$$$