A Store Applies a 15 Percent Service Charge on All

A store applies a 15 percent service charge on all items with a price of at least $150.No service charge is otherwise applicable.Which of the following DOES NOT correctly compute the service charge?

A) double servicecharge =0;
if (cos t>=150)
{
serviceCharge =0.15 * cost;
}
B) double serviceCharge =0.15^* cost;
if (cos t<=150)
{
serviceCharge =0;
}
C) double serviceCharge;
if (cost<150)
{
serviceCharge =0;
}
else
{
serviceCharge =0.15 * cost;
}
D) double servicecharge =15;
if (cost>=150)
{
serviceCharge =0.15 * cost;
}
else
{
serviceCharge =0;
}