Proposition 1 would boost C-Tran’s local sales tax rate by 0.2 percentage points, from 0.5 to 0.7 percent. That’s a difference of 2 cents on every $10 purchase for consumers.PUSHING FOR A YES VOTEKeep Clark County Moving reports total contributions of $93,561.05 since January, spending $84,948.58 so far in favor of C-Tran’s Proposition 1.PUSHING FOR A NO VOTENoTolls,com and Save Our City have spent a combined $12,736.91 campaigning against Proposition 1. The two groups have also spent money supporting several local races and candidates.The political action committee campaigning in favor of C-Tran’s Proposition 1 is closing in on $100,000 in total contributions, keeping pace with this year’s big-spending local elections in Clark County.Keep Clark County Moving — which has spent most of the money flowing into the campaign around C-Tran’s proposed sales tax increase — has collected nearly $94,000 since January, according to Public Disclosure Commission filings. The group had spent close to $85,000 of that as of Oct. 31.The group lists dozens of individual contributors, but has been buoyed by several large donations.Among the biggest donors: California-based bus manufacturer Gillig ($10,000); Vancouver resident Ed Lynch ($7,500 over four donations); Amalgamated Transit Union Local 757 ($5,000), which represents C-Tran bus drivers and other employees; and Waste Connections, Inc. ($5,000). The ATU Legislative Council of Olympia also kicked in $3,000, and Columbia River Crossing consultant David Evans & Associates donated $2,500 in March, records show.