IMAS 2024–2025 — Middle Primary — Round 2 Question 11

Let $ABCDEFGHJ$ be a nine-pointed star, as shown in the diagram below, where $\angle A=\angle D=90^\circ$.



What is the sum, in degrees, of $\angle B+\angle C+\angle E+\angle F+\angle G+\angle H+\angle J$?