Fit World began January with merchandise inventory of $80$ crates of vitamins that cost a total of $$3,600.$ During the month, Fit World purchased and sold merchandise on account as follows:

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Transactions

$\backslash$table$[[$Jan$.5,$Purchase,$120$ crates @ $$58$ each$],[$Jan$.13,$Sale,$130$ crates @ $$108$ each$],[$Jan$.18,$Purchase,$130$ crates @ $$72$ each$],[$Jan$.26,$Sale,$140$ crates @ $$110$ each$]]$