The 125% markup is $38.465 which I rounded it to $38.47 since it's money
To find the markup, you have to multiply 1.25 by 30.78 which you get $38.47 and then add it by $30.78 which you get $69.24
Then you multiply 10% or .10 by 69.24 which you get $6.92.
Finally, you just subtract $6.92 from $69.24 and you get the price of the watch which is $62.32