The digit in the tens place is 2 less than the one in the hundreds place. But when you add them together, they total 8, which is the digit in the thousands place. Therefore A is 5 and B is 3. In the tenths place, the digit has the same value in every place. The only digit that works here is 0, which is worth 0 no matter where in the number it is placed.
Remaining digitis largest even digit, which is 8.
The answer is 8538.01