//Function to find the given item number and delete it in KnightsMartRestockProduct list.
void deleteNodeRestockList(struct KnightsMartRestockProduct **head_ref, int key) {
// Store head node
struct KnightsMartRestockProduct *temp = *head_ref, *prev;

// If head node itself holds the key to be deleted
if (temp != NULL && temp->itemNum == key) {
    *head_ref = temp->next;   // Changed head
    free(temp);               // free old head
    return;
}

// Search for the key to be deleted, keep track of the
// previous node as we need to change 'prev->next'
while (temp != NULL && temp->itemNum != key) {
    prev = temp;
    temp = temp->next;
}

// If key was not present in linked list
if (temp == NULL) return;

// Unlink the node from linked list
prev->next = temp->next;

free(temp);  // Free memory
}