Need help in writing a letter to my customers about increasas the prices due to costs increase in manufacturing the products

Price increases are difficult to communicate. Don't sugar coat it but explain the reasons (economic- cost of living, material cost increase, shipping and handling, etc.) for the increase and your company's policy regarding such matters.

Depending on the situation, you may opt for a face to face meeting rather than a letter.

Always remember to point out that you value your customers business and hopefully you can use the increased cost to provide better service. Make sure you thank them for their continued patronage.

Dear Insert Customer Name Here,

I hope you appreciate and understand the following update as much
As we appreciate your continued business.

As you are aware that the recent increases in almost all facets of business
Costs have gone up across the board. We have no other choice to adjust some
Of our pricing to reflect these new expenses.

You'll still be receiving the highiest quality in services and support from us.

We have to be solid in our business model to make sure that we are around
For many many more years to serve you.

Sincerely,

(put your name here)

PS. Remember we are in this together with you.

Also use spell check! It would be "board" nor "boad"