To solve this problem, we need to follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

First, within the parentheses:
540 ÷ 27 = 20
20 - 7 = 13

Now, we replace the operation inside the parentheses with the result:
90 - (400 • 6) ÷ (5 • 16) + 4 • 13

Next, we perform the multiplication and division:
90 - (2400) ÷ (80) + 52

Now, we simplify the division and subtraction further:
90 - 30 + 52

Next, we add and subtract to get the final answer:
90 - 30 = 60
60 + 52 = 112

Therefore, the final result is 112.