Laker Company reported the following January purchases and sales data for its only product.

$\backslash$table$[[$Date$,\frac{?}{\text{b}\text{a}\text{r}}($ Activities $),$Units Acquired at Cost,Units sold at Retail$],[$Jan$.1,$Beginning inventory,$200$ units @ $$7\mathrm{.}00=$$$1,400,],[$Jan$.10,$Sales,,$160$ units @ $$18\mathrm{.}00=$$$2,880],[$Jan$.20,$Purchase,$150$ units @ $$6\mathrm{.}80=1,020,],[$Jan$.25,$Sales,,$100$ units @$$18\mathrm{.}00=$$$1\mathrm{.}800$