L = Lecture, P = Practical, S = Skill. "Weighted %" is the ERP's own figure. "To reach" = classes in a row you'd need to attend to get to the target; "Can skip" = classes you could miss and still stay at the target. "Rest of semester" uses your weekly timetable (reconstructed below) and the academic calendar: it counts the classes each slot will still hold until the last instruction day, skipping Sundays, holidays and exam weeks, and discounts the usual cancellation rate. Pick the target your department uses.