Fill in the blanks $($a$)$ through $(g)$ for each of the income statements for Year $1,$ Year $2,$ and Year $3.$

$\backslash$table$[[$Income Statements$],[$For Years Ended December $31],[,$Year $1,$Year $2,$Year $3],[$Net sales,$$,7,830,$$$,10,550,],[$Cost of goods sold$],[$Merchandise inventory, beginning,,$430,860],[$Total cost of merchandise purchases,$2,620,3,900,5,150],[$Merchandise inventory, ending,,$860,680],[$Cost of goods sold,$2,990,,5,330],[$Gross profit,,$7,080,5,530],[$Operating expenses,$3,970,3,970,],[$Net income $($loss$),815,,2,720]]$