Iran updates: Trump says he'll suspend federal gas tax to help address high fuel prices

The Iran war is estimated to have cost $29 billion, acting Pentagon comptroller Jules W. Hurst III told lawmakers Tuesday morning during a House Appropriations hearing.

Two weeks ago, Hurst testified it was $25 billion, much of which was attributed to munitions costs.

Hurst said the updated number comes after accounting for, "replacement of equipment costs and also just general operational costs keep people in theater."

Rep. Pete Aguilar, D-Calif., asked Secretary of Defense Pete Hegseth when Congress would get a more detailed accounting for war costs.

"When it's relevant and required, we will share it," Hegseth responded.

-ABC News' Steven Beynon

President Donald Trump says he'll suspend the federal gas tax to help address high fuel prices due to the Iran war.

Oil prices climbed after President Donald Trump rejected Iran's latest proposed peace deal as "totally unacceptable," with the U.S. and Iran still appearing far apart on any resolution to the war.

Oil was at nearly $98 a barrel -- up 2.5% -- in U.S. trading as of Monday morning, with global oil at $104, up nearly 3%.

The average price of a gallon of regular gas on Monday was $4.48, down 3.7 cents compared to Sunday and up $1.54 since the war started, according to GasBuddy.

Secretary of State Marco Rubio told reporters the administration expected a response from the Iranian regime on Friday, but that "only stupid countries" wouldn't respond to fire with fire when facing attacks like the U.S. did in the Strait of Hormuz.

"The red line is clear: They threaten Americans, they're gonna get blown up," Rubio told reporters Friday.

"If you fire at a U.S. Navy ship, what are we supposed to do?" Rubio said. "Of course we fired back on them. They were shooting at us. That's what I would expect to do. Only stupid countries don't shoot back when you're shot at," Rubio said. "And we're not a stupid country."

On talks with the regime, Rubio said "we should know something today" and "the hope is it's something that it can put us into a serious process of negotiation."

"We're expecting a response from them today, at some point. We have not received that yet as-in the last in the last hour, but perhaps that will come. Their system is still highly fractured and a bit dysfunctional as well, so that may be serving as an impediment," Rubio said. "I hope it's a serious offer. I really do."