answer asap please

It costs Concord Corporation $12 of variable and $5 of fixed costs to produce one bathroom scale which normally sells for $35. A foreign wholesaler offers to purchase 2300 scales at $15 each. Garner would incur special shipping costs of $1 per scale if the order were accepted. Concord has sufficient unused capacity to produce the 2300 scales. If the special order is accepted, what will be the effect on net income? $6900 decrease $4600 increase $4600 decrease O $34500 increase