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Function tls(th) As Single
Dim maxw As Single
Dim tl As Single
Dim tr As Single
Dim tp As Single
Dim w1 As Single
Dim n As Single
maxw = -999
For n = 1 To 400
tl = 0.001 * n
tr = trs(th, tl)
w1 = wel(th, tl, tr)
If w1 > maxw Then tp = tl
If w1 > maxw Then maxw = w1
Next
tls = tp
End Function