The accounting records of The Oriole Warehouse show the following data.

Jan $1$ Beg Inventory $50$ units at $$15$

Jan $7$ Sale $25$ units

Jan $18$ Purchase $40$ units at $$22$

Jan $27$ Sale $40$ units

Determine the cost of goods sold during January under a perpetual inventory system using FIFO

Cost of goods sold $ $\_\_\_\_\_\_\_\_\_\_\_\_\_\_$