$1)$ Fixed costs of our business are determined as $400\mathrm{.}000$$$.$ Our sale price is $50$$ and CMT $75\%.$ Estimating to get $330\mathrm{.}000$$ profit in the following period.A research in the market revealed such outcomes:

a$)10\%$ increase in the price sales will decrease $20\%,$

b$)20\%$ increase in the price sales will decrease $35\%,$

c$)25\%$ increase in the price sales will decrease $50\%.$

If a change in the price is needed, then which alternative is to be used.