PO Receipt sends the whole value to variance account

Hi, I've tried searching but could not find any answer and my costing knowledge is not too good. This might be too vague though.

We have recently received one item (1pcs) from PO and the whole value wet to variance account. Both receiving and inspection where done at a 3days distance, same period.

Receipt into Receiving Inspection - this one looks fine

receiving inspection - DR=XXX$

accrual - CR=XXX$

PO Delivery into Inventory - this one is on variance

cost variance - DR=XXX$

receiving inspection - CR=XXX$

Prior to this there have been some transactions for this item, but before the receipt, the stock was zero.