You can simply calculate best 5 marks by keepibg all subjects scaled down or up to 100marks maximum. 

Adding following subject marks like :

• Physics 67
• Chemistry 57
• Maths 76
• English 75
• Evs 100/100 ( scaled upto 100)

Total is 375marks for best of top 5 subjects .

If you scale down 161/200 in Vocational subject then it bcecomes 80.5/100 which is much lowwe to your EVsscore of 100/100and henec we dont consider marks of Vocational subject for calculations.