Jacob is building ladders. One of his clients needs 10 ladders with 50 rungs, and 20 ladders with 60 rungs. Jacob has to charge $2 for every rung. How much does the client have to pay for the ladders?
Let's think step by step.
3400
10 ladders with 50 rungs have a total of 10 * 50 = 500 rungs.

20 ladders with 60 rungs have a total of 20 * 60 = 1200 rungs.

In total there are 1200 + 500 = 1700 rungs.

The client must pay 2 * 1700 = $3400.

.

So, the final answer is 3400