Please answer the following question by reasoning step-by-step.
On a construction site, the Laker cement factory provided 500 bags of cement sold to Mr. Zander at $10 per bag. Mr. Zander also received twenty lorries of construction sand, each carrying 10 tons of sand, sold at $40 per ton. How much money did Mr. Zander pay for these construction materials?

13000
The total cost for the sand is 500 * 10 = $5000.

Since each lorry was carrying 10 tons of sand, the twenty lorries carried 20 * 10 = 200 tons.

At $40 per ton, Mr.

Zander paid 200 * $40 = $8000 for the sand that was delivered to his construction site.

Altogether, Mr.

Zander paid $8000 + $5000 = $13000 for the delivered construction materials.

.

The final answer: 13000