You work for a wholesale firm which distributes a single product. $$57,600$ is the value for opening inventory $(1$ Oct $2020).$ Closing inventory valuation conducted on $31$ October $2020,$ $$80640$

Purchases during the month were:

$9$ October $1,140$ units @ $145$ each

$15$ October $1,310$ units @ $150$ each

$24$ October $620$ units@ $155$ each

Sales during the month were:

Date Number of items selling price per item

$

$12$ October $1,040205$

$21$ October $1,840220$

The other cost besides the purchases were: Wages of staff $$44,700$; Premises purchased $$42,750$; Administrative expenses $$13,620$; Selling and marketing costs $$17,890$; Cost and freight for purchased inventory $ $3,750$; Carriage outwards $$4,120$ and Depreciation charges $$11,250$

What is sum of the operating expenditure or period cost for the month of October $2020?$