Find the value of $K$ from the given equation:
$$13450+12846-1230-K=23670+987$$

Let's simplify both sides of the equation step-by-step:
Given equation:

$$13450+12846-1230-K=23670+987$$

First, simplify the Left-Hand Side (LHS) constants:

$$13450+12846=26296$$

$$26296-1230=25066$$

So, $\text{LHS}=25066-K$

Next, simplify the Right-Hand Side (RHS) constants:

$$23670+987=24657$$

Now, equate both sides:

$$25066-K=24657$$

Solve for $K$:

$$K=25066-24657$$

$$K=409$$