K. Gus,
The premium cake 8" round without topping will be less 50 Baht per kind. However, re-sizing the existing roll cakes cannot be done. The R&D sent by PH had no time to do the product development now, she is staying only for 2 weeks and cannot do additional work.
Regarding cookies you can offer the existing variants in stores, you had a lot to choose from already. Any new variants as may be requested you need to discuss with K. Fone of Marketing so she can include it in her activities. Thanks.