Please answer with detailed calculations and good formatting and make sure the answer is 100% correct, else leave it for the other tutor to answer. Otherwise i will downvote the answer and report it for uprofessionalism for sure. Please don't use AI or Chat GPT also make sure there is no plagiari.sm.

Philip Inc. Incurs costs of $280 per unit ($180 variable and $100 fixed) to make a pen that normally sells for $420. A foreign wholesaler offers to buy 5,000 units at $250 each. The special order results in additional shipping costs of $10 per unit. Compute the increase or decrease in net income Philip Inc. realizes by accepting the special order, assuming Philip Inc. has excess operating capacity. (Please just give me the answer, without any symbols such as $ signs, commas, etc) Finish atamol