To calculate the effect of the acceptance of the offer on net income, we need to calculate the profit from the opportunity.
The revenue per unit is shall be $30 and the relevant cost per unit shall be the variable cost $28
Hence the peofit per unit shall be = Revenue - Relevant cost = $30-$28 = $2 per unit
There are 3000 units, hence the net profit from this opportunity shall be = 3000 units * $2 = $6000
Hence, we can say that the profit shall increase by $6,000