The total manufacturing cost of product \(P\) is equal to the sum of product \(P\)'s fixed cost and line cost. If the line cost of manufacturing \(P\) decreased by \(10\%\) in March compared to previous month, by what percent did the total cost of manufacturing product \(P\) change in that March over the previous month?

1) The fixed cost of manufacturing product \(P\) increased by \(15\%\) in March compared to previous month

2) Before the changes in March, the fixed cost of manufacturing product \(P\) was \(10\) times the line cost of manufacturing product \(P\)

The OA is C