Using 2 Tables With Decode Function

What I have to do is this:

List supplier�s name, id, number of pending orders, number of completed orders and number of all orders from this supplier. (my query doesn't include the last part yet).

My tables are as follows:

Suppliers:
S_ID
NAME
ADDRESS
PROVINCE
PHONE_NUMBER

Orders:
ORD_ID
SUPPLIER_ID
ISSUING_EMP_ID
ORDER_DATE
ORDER_STATUS

and this is what I have so far:
select name, s_id
sum(decode(order_status, 'P',1,0)) pending,
sum(decode(order_status, 'C',1,0)) completed
from suppliers
where s_id in
(select supplier_id from orders);

but I still get an error that says "sum(decode(order_status, 'P',1,0)) pending,
*
ERROR at line 2:
ORA-00923: FROM keyword not found where expected"

I assume this is because I'm not properly referencing the orders table.