Price = (p + 1)(b)
In this scenario, the variable 'p' represents the profit in percentage (This equation assumes that you input percentage in a decimal).
'b' represents the base price or the original price.
-T.B.
12 - 23 = -11
-11 + 1,345 = 1,334
1,334/123 = 10.85
13.63 * 38 = 517.94
671.28 - 517.94 = 153.88
153.88 : 13.63 = 11.25 the number of hours she overworked
I think is 3 and 2/3 (I hope I got it right)