Following six straight weekly increases, the average national price of retail diesel fuel dipped 0.4 cent to $2.681 a gallon, the Department of Energy reported Monday.

Eaton Wins Patents for Hybrid-Electric Power • CSX Joins EPA Greenhouse-Gas Reduction Program • UPS Boosts Technology Offering

Trailer maker Wabash National Corp. said Friday its first-quarter sales will drop by about 1,000 units from the previous first quarter to about 10,800 trailers.

The average national price of diesel fuel gained another 5.9 cents from last week in rising to $2.685 a gallon, a sixth straight increase, the Department of Energy said Monday.

Logistics and delivery firm Dynamex Inc. said its fiscal second-quarter net income rose to $3.7 million or 35 cents a share, from $2.7 million or 24 cents a year earlier.

Canadian transportation firm Mullen Group Income Fund reported its fourth-quarter profit fell to C$14 million or 17 cents per share, from C$24.7 million or 52 cents a year earlier.

FedEx National LTL, FedEx Corp.’s long-haul less-than-truckload unit, said that Chip Watkins, the division’s president, has resigned for personal reasons.

The average national price of diesel fuel jumped 7.5 cents to $2.626 a gallon, while gasoline soared 12.2 cents from last week to $2.505, the Department of Energy said Monday.

Canadian firm Contrans Income Fund reported it earned C$7.8 million or 34 cents a unit, compared with C$6.3 million or 33 cents a year earlier.

Canadian holding company Clarke Inc. on Monday reported fourth-quarter net income of C$4.4 million or 28 cents a share, up from C$3.2 million or 23 cents a year earlier.