500+500+500+500+500+500+500
=1000+500+500+500+500+500
=1500+500+500+500+500
=2000+500+500+500
=2500+500+500
=3000+500
=3500
Удачи в учебе
500+500+500+500+500+500+500
=1000+500+500+500+500+500
=1500+500+500+500+500
=2000+500+500+500
=2500+500+500
=3000+500
=3500