Okay... pretty simple, but i just wanted verification, does this look right?

I'll be implementing this into a command-line based app, otherwise I'd use some spreadsheet or something.

Code:Data x in 09:25 out 13:14 y in 13:45 out 18:13 Formula hours(x,y) = ((in[hour] * 60 + in[minute]) - (out[hour] * 60 + out[minute])) / 60 Example x(3.42) = ((9 * 60 + 25) - (13 * 60 + 14)) / 60 y(4.47) = ((13 * 60 + 45) - (18 * 60 + 13)) / 60 z(7.89) = x + y