Find-the-Consumer-s-Surplus-corresponding-to-q-150-Calculus-Question-help

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Hello,

I am seeking help on my final calculus problem. I don’t know what I am doing wrong, since I keep getting -/+ $483360. 

Here is the question:

Suppose the demand function for a product is given by the function: D(q)=−0.012q+45.6

Find the Consumer’s Surplus corresponding to q = 150.

Do not round the results until the very end of your calculations. At that point, round to the nearest tenth, if necessary. It may help you to sketch the demand curve, which crosses the horizontal at q = 3, 800. 

Please note the “3, 800” are two different numbers. 

Thank you!