Let

'v' = typing rate of Josh represented in words per minute. 

'x' = the number of words typed in 60 minutes

v = number of words/typing time

v = 496/8

v = 62 words per min

Now we can also write:

v = x/60

Solve for 'x' by multiplying both sides of the equation by '60'

60v = x

x = 60v

Plug in v = 62 words/min

x = 60*62

x = 3,720 words

Josh can type 3,720 words in 60 minutes.