A gymnasium weighs all the people that come in to exercise. On one morning, it notes down the weights of 5 people in kgs as follows :

58 kgs, 75 kgs, 83.3 kgs, 83 kgs, 75.7 kgs

The average of their weight is calculated.

If a new person now comes in to exercise, and the new average is calculated to be 76.5, then what was the weight of the new person?​