My wedding is in late July. Stupidly, I made my RSVP date June 1, instead of July 1.

The reply card says, "The favor of a reply is requested by the first of june"...
Would you pay around $130 for new reply cards or would you write over "june" and magically turn it into "july"? The ink color is light purple, so if I wrote over "june", it would be obvious. Any other suggestions?