You guys have calculated the 45% margin based on sales price. The correct method, and consistent with past reports, is calculation of margin based on COGS.
$5.6m of Gross Profit from $13m of sales is 75% margins.
$13m of sales with gross margins of 45% only yields $4m. The breakout is $13m sales, COGS=$9m, 45% on COGS=$4m.
I also do not understand how you got overheads of $3.2m.