Sometimes in engineering and surveying, distances along a line or curve from a beginning point are expressed as station numbers. For example, the first point could be 50.50 feet from the beginning point and would be expressed as 0+50.50, the next point might be 136.68 feet from the beginning point and would be expressed as 1+36.68 and the next point might be 243.89 feet from the beginning point and would be expressed as 2+43.89. Can someone show me how I can get excel to add or subtract these station numbers?

Thanks in advance for your help.